From 9b0a62758665e4d76269bba61eb63e5b8d18e499 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 22 Feb 2024 14:52:01 +0100
Subject: [PATCH 01/17] thermal: core: Store zone trips table in struct
 thermal_zone_device

The current code expects thermal zone creators to pass a pointer to a
writable trips table to thermal_zone_device_register_with_trips() and
that trips table is then used by the thermal core going forward.

Consequently, the callers of thermal_zone_device_register_with_trips()
are required to hold on to the trips table passed to it until the given
thermal zone is unregistered, at which point the trips table can be
freed, but at the same time they are not expected to access that table
directly.  This is both error prone and confusing.

To address it, turn the trips table pointer in struct thermal_zone_device
into a flex array (counted by its num_trips field), allocate it during
thermal zone device allocation and copy the contents of the trips table
supplied by the zone creator (which can be const now) into it, which
will allow the callers of thermal_zone_device_register_with_trips() to
drop their trip tables right after the zone registration.

This requires the imx thermal driver to be adjusted to store the new
temperature in its internal trips table in imx_set_trip_temp(), because
it will be separate from the core's trips table now and it has to be
explicitly kept in sync with the latter.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/thermal/imx_thermal.c  |  1 +
 drivers/thermal/thermal_core.c | 18 +++++++++---------
 drivers/thermal/thermal_of.c   |  4 ++--
 drivers/thermal/thermal_trip.c |  2 +-
 include/linux/thermal.h        | 10 +++++-----
 5 files changed, 18 insertions(+), 17 deletions(-)

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 7019c4fdd5494..499eff858f3f0 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -354,6 +354,7 @@ static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip_id,
 		return -EINVAL;
 
 	imx_set_alarm_temp(data, temp);
+	trips[IMX_TRIP_PASSIVE].temperature = temp;
 
 	pm_runtime_put(data->dev);
 
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index dfaa6341694a0..8bdece8b15368 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1227,9 +1227,6 @@ int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp)
 	if (tz->ops->get_crit_temp)
 		return tz->ops->get_crit_temp(tz, temp);
 
-	if (!tz->trips)
-		return -EINVAL;
-
 	mutex_lock(&tz->lock);
 
 	for (i = 0; i < tz->num_trips; i++) {
@@ -1272,10 +1269,13 @@ EXPORT_SYMBOL_GPL(thermal_zone_get_crit_temp);
  * IS_ERR*() helpers.
  */
 struct thermal_zone_device *
-thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *trips, int num_trips, int mask,
-					void *devdata, struct thermal_zone_device_ops *ops,
-					const struct thermal_zone_params *tzp, int passive_delay,
-					int polling_delay)
+thermal_zone_device_register_with_trips(const char *type,
+					const struct thermal_trip *trips,
+					int num_trips, int mask,
+					void *devdata,
+					struct thermal_zone_device_ops *ops,
+					const struct thermal_zone_params *tzp,
+					int passive_delay, int polling_delay)
 {
 	struct thermal_zone_device *tz;
 	int id;
@@ -1322,7 +1322,7 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t
 	if (!thermal_class)
 		return ERR_PTR(-ENODEV);
 
-	tz = kzalloc(sizeof(*tz), GFP_KERNEL);
+	tz = kzalloc(struct_size(tz, trips, num_trips), GFP_KERNEL);
 	if (!tz)
 		return ERR_PTR(-ENOMEM);
 
@@ -1354,7 +1354,7 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t
 	tz->ops = ops;
 	tz->device.class = thermal_class;
 	tz->devdata = devdata;
-	tz->trips = trips;
+	memcpy(tz->trips, trips, num_trips * sizeof(*trips));
 	tz->num_trips = num_trips;
 
 	thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay);
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 4d6c22e0ed85b..20fa7d5ac536b 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -438,12 +438,10 @@ static int thermal_of_unbind(struct thermal_zone_device *tz,
  */
 static void thermal_of_zone_unregister(struct thermal_zone_device *tz)
 {
-	struct thermal_trip *trips = tz->trips;
 	struct thermal_zone_device_ops *ops = tz->ops;
 
 	thermal_zone_device_disable(tz);
 	thermal_zone_device_unregister(tz);
-	kfree(trips);
 	kfree(ops);
 }
 
@@ -526,6 +524,8 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node *
 		goto out_kfree_trips;
 	}
 
+	kfree(trips);
+
 	ret = thermal_zone_device_enable(tz);
 	if (ret) {
 		pr_err("Failed to enabled thermal zone '%s', id=%d: %d\n",
diff --git a/drivers/thermal/thermal_trip.c b/drivers/thermal/thermal_trip.c
index c875a26d5adf4..a80ca78f8473d 100644
--- a/drivers/thermal/thermal_trip.c
+++ b/drivers/thermal/thermal_trip.c
@@ -122,7 +122,7 @@ void __thermal_zone_set_trips(struct thermal_zone_device *tz)
 int __thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id,
 			    struct thermal_trip *trip)
 {
-	if (!tz || !tz->trips || trip_id < 0 || trip_id >= tz->num_trips || !trip)
+	if (!tz || trip_id < 0 || trip_id >= tz->num_trips || !trip)
 		return -EINVAL;
 
 	*trip = tz->trips[trip_id];
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 65d8f92a9a0db..572a24f29a106 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -130,7 +130,6 @@ struct thermal_cooling_device {
  * @trip_hyst_attrs:	attributes for trip points for sysfs: trip hysteresis
  * @mode:		current mode of this thermal zone
  * @devdata:	private pointer for device private data
- * @trips:	an array of struct thermal_trip
  * @num_trips:	number of trip points the thermal zone supports
  * @passive_delay_jiffies: number of jiffies to wait between polls when
  *			performing passive cooling.
@@ -160,6 +159,7 @@ struct thermal_cooling_device {
  * @poll_queue:	delayed work for polling
  * @notify_event: Last notification event
  * @suspended: thermal zone suspend indicator
+ * @trips:	array of struct thermal_trip objects
  */
 struct thermal_zone_device {
 	int id;
@@ -172,7 +172,6 @@ struct thermal_zone_device {
 	struct thermal_attr *trip_hyst_attrs;
 	enum thermal_device_mode mode;
 	void *devdata;
-	struct thermal_trip *trips;
 	int num_trips;
 	unsigned long passive_delay_jiffies;
 	unsigned long polling_delay_jiffies;
@@ -193,10 +192,11 @@ struct thermal_zone_device {
 	struct list_head node;
 	struct delayed_work poll_queue;
 	enum thermal_notify_event notify_event;
+	bool suspended;
 #ifdef CONFIG_THERMAL_DEBUGFS
 	struct thermal_debugfs *debugfs;
 #endif
-	bool suspended;
+	struct thermal_trip trips[] __counted_by(num_trips);
 };
 
 /**
@@ -315,7 +315,7 @@ int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp);
 #ifdef CONFIG_THERMAL
 struct thermal_zone_device *thermal_zone_device_register_with_trips(
 					const char *type,
-					struct thermal_trip *trips,
+					const struct thermal_trip *trips,
 					int num_trips, int mask,
 					void *devdata,
 					struct thermal_zone_device_ops *ops,
@@ -375,7 +375,7 @@ void thermal_zone_device_critical(struct thermal_zone_device *tz);
 #else
 static inline struct thermal_zone_device *thermal_zone_device_register_with_trips(
 					const char *type,
-					struct thermal_trip *trips,
+					const struct thermal_trip *trips,
 					int num_trips, int mask,
 					void *devdata,
 					struct thermal_zone_device_ops *ops,

From 9686f04a7ba6366dbdbb5609dc26a6282803b888 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 22 Feb 2024 18:15:39 +0100
Subject: [PATCH 02/17] thermal: ACPI: Discard trips table after zone
 registration

Because the thermal core creates and uses its own copy of the trips
table passed to thermal_zone_device_register_with_trips(), it is not
necessary to hold on to a local copy of it any more after the given
thermal zone has been registered.

Accordingly, modify the ACPI thermal driver to store the trips table
passed to thermal_zone_device_register_with_trips() in a local variable
which is automatically discarded when acpi_thermal_add() returns to
its caller.

Also make some additional code simplifications unlocked by the above
change.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/acpi/thermal.c | 57 +++++++++++++++---------------------------
 1 file changed, 20 insertions(+), 37 deletions(-)

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 4748e80612534..6c4ba00d60e21 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -47,6 +47,8 @@
 
 #define ACPI_THERMAL_TRIP_PASSIVE	(-1)
 
+#define ACPI_THERMAL_MAX_NR_TRIPS	(ACPI_THERMAL_MAX_ACTIVE + 3)
+
 /*
  * This exception is thrown out in two cases:
  * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
@@ -112,7 +114,6 @@ struct acpi_thermal {
 	unsigned long polling_frequency;
 	volatile u8 zombie;
 	struct acpi_thermal_trips trips;
-	struct thermal_trip *trip_table;
 	struct thermal_zone_device *thermal_zone;
 	int kelvin_offset;	/* in millidegrees */
 	struct work_struct thermal_check_work;
@@ -451,26 +452,19 @@ static bool acpi_thermal_init_trip(struct acpi_thermal *tz, int index)
 	return false;
 }
 
-static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
+static void acpi_thermal_get_trip_points(struct acpi_thermal *tz)
 {
-	unsigned int count = 0;
 	int i;
 
-	if (acpi_thermal_init_trip(tz, ACPI_THERMAL_TRIP_PASSIVE))
-		count++;
+	acpi_thermal_init_trip(tz, ACPI_THERMAL_TRIP_PASSIVE);
 
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
-		if (acpi_thermal_init_trip(tz, i))
-			count++;
-		else
+		if (!acpi_thermal_init_trip(tz, i))
 			break;
-
 	}
 
 	while (++i < ACPI_THERMAL_MAX_ACTIVE)
 		tz->trips.active[i].trip.temp_dk = THERMAL_TEMP_INVALID;
-
-	return count;
 }
 
 /* sys I/F for generic thermal sysfs support */
@@ -662,13 +656,14 @@ static void acpi_thermal_zone_sysfs_remove(struct acpi_thermal *tz)
 }
 
 static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz,
+					      const struct thermal_trip *trip_table,
 					      unsigned int trip_count,
 					      int passive_delay)
 {
 	int result;
 
 	tz->thermal_zone = thermal_zone_device_register_with_trips("acpitz",
-								   tz->trip_table,
+								   trip_table,
 								   trip_count,
 								   0, tz,
 								   &acpi_thermal_zone_ops,
@@ -823,10 +818,10 @@ static void acpi_thermal_free_thermal_zone(struct acpi_thermal *tz)
 
 static int acpi_thermal_add(struct acpi_device *device)
 {
+	struct thermal_trip trip_table[ACPI_THERMAL_MAX_NR_TRIPS] = { 0 };
 	struct acpi_thermal_trip *acpi_trip;
 	struct thermal_trip *trip;
 	struct acpi_thermal *tz;
-	unsigned int trip_count;
 	int crit_temp, hot_temp;
 	int passive_delay = 0;
 	int result;
@@ -848,21 +843,10 @@ static int acpi_thermal_add(struct acpi_device *device)
 	acpi_thermal_aml_dependency_fix(tz);
 
 	/* Get trip points [_CRT, _PSV, etc.] (required). */
-	trip_count = acpi_thermal_get_trip_points(tz);
+	acpi_thermal_get_trip_points(tz);
 
 	crit_temp = acpi_thermal_get_critical_trip(tz);
-	if (crit_temp != THERMAL_TEMP_INVALID)
-		trip_count++;
-
 	hot_temp = acpi_thermal_get_hot_trip(tz);
-	if (hot_temp != THERMAL_TEMP_INVALID)
-		trip_count++;
-
-	if (!trip_count) {
-		pr_warn(FW_BUG "No valid trip points!\n");
-		result = -ENODEV;
-		goto free_memory;
-	}
 
 	/* Get temperature [_TMP] (required). */
 	result = acpi_thermal_get_temperature(tz);
@@ -881,13 +865,7 @@ static int acpi_thermal_add(struct acpi_device *device)
 
 	acpi_thermal_guess_offset(tz, crit_temp);
 
-	trip = kcalloc(trip_count, sizeof(*trip), GFP_KERNEL);
-	if (!trip) {
-		result = -ENOMEM;
-		goto free_memory;
-	}
-
-	tz->trip_table = trip;
+	trip = trip_table;
 
 	if (crit_temp != THERMAL_TEMP_INVALID) {
 		trip->type = THERMAL_TRIP_CRITICAL;
@@ -923,9 +901,17 @@ static int acpi_thermal_add(struct acpi_device *device)
 		trip++;
 	}
 
-	result = acpi_thermal_register_thermal_zone(tz, trip_count, passive_delay);
+	if (trip == trip_table) {
+		pr_warn(FW_BUG "No valid trip points!\n");
+		result = -ENODEV;
+		goto free_memory;
+	}
+
+	result = acpi_thermal_register_thermal_zone(tz, trip_table,
+						    trip - trip_table,
+						    passive_delay);
 	if (result)
-		goto free_trips;
+		goto free_memory;
 
 	refcount_set(&tz->thermal_check_count, 3);
 	mutex_init(&tz->thermal_check_lock);
@@ -944,8 +930,6 @@ static int acpi_thermal_add(struct acpi_device *device)
 flush_wq:
 	flush_workqueue(acpi_thermal_pm_queue);
 	acpi_thermal_unregister_thermal_zone(tz);
-free_trips:
-	kfree(tz->trip_table);
 free_memory:
 	acpi_thermal_free_thermal_zone(tz);
 
@@ -966,7 +950,6 @@ static void acpi_thermal_remove(struct acpi_device *device)
 
 	flush_workqueue(acpi_thermal_pm_queue);
 	acpi_thermal_unregister_thermal_zone(tz);
-	kfree(tz->trip_table);
 	acpi_thermal_free_thermal_zone(tz);
 }
 

From fcbf8780008609380d2e5b407c5bb7950fff018c Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 5 Feb 2024 22:16:59 +0100
Subject: [PATCH 03/17] thermal: intel: Discard trip tables after zone
 registration

Because the thermal core creates and uses its own copy of the trips
table passed to thermal_zone_device_register_with_trips(), it is not
necessary to hold on to a local copy of it any more after the given
thermal zone has been registered.

Accordingly, modify Intel thermal drivers to discard the trips tables
passed to thermal_zone_device_register_with_trips() after thermal zone
registration, for example by storing them in local variables which are
automatically discarded when the zone registration is complete.

Also make some additional code simplifications unlocked by the above
changes.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 .../int340x_thermal/int340x_thermal_zone.c    |  6 +--
 .../int340x_thermal/int340x_thermal_zone.h    |  1 -
 .../processor_thermal_device_pci.c            |  7 ++--
 drivers/thermal/intel/intel_pch_thermal.c     | 24 ++++++------
 .../thermal/intel/intel_quark_dts_thermal.c   | 12 +++---
 drivers/thermal/intel/intel_soc_dts_iosf.c    | 38 ++++++++-----------
 drivers/thermal/intel/intel_soc_dts_iosf.h    |  1 -
 drivers/thermal/intel/x86_pkg_temp_thermal.c  | 35 ++++++-----------
 8 files changed, 51 insertions(+), 73 deletions(-)

diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
index 3e4bfe817fac2..950e91ca5f425 100644
--- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
+++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -179,8 +179,6 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 	for (i = 0; i < trip_cnt; ++i)
 		zone_trips[i].hysteresis = hyst;
 
-	int34x_zone->trips = zone_trips;
-
 	int34x_zone->lpat_table = acpi_lpat_get_conversion_table(adev->handle);
 
 	int34x_zone->zone = thermal_zone_device_register_with_trips(
@@ -190,6 +188,8 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 							int34x_zone->ops,
 							&int340x_thermal_params,
 							0, 0);
+	kfree(zone_trips);
+
 	if (IS_ERR(int34x_zone->zone)) {
 		ret = PTR_ERR(int34x_zone->zone);
 		goto err_thermal_zone;
@@ -203,7 +203,6 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 err_enable:
 	thermal_zone_device_unregister(int34x_zone->zone);
 err_thermal_zone:
-	kfree(int34x_zone->trips);
 	acpi_lpat_free_conversion_table(int34x_zone->lpat_table);
 err_trips_alloc:
 	kfree(int34x_zone->ops);
@@ -217,7 +216,6 @@ void int340x_thermal_zone_remove(struct int34x_thermal_zone *int34x_zone)
 {
 	thermal_zone_device_unregister(int34x_zone->zone);
 	acpi_lpat_free_conversion_table(int34x_zone->lpat_table);
-	kfree(int34x_zone->trips);
 	kfree(int34x_zone->ops);
 	kfree(int34x_zone);
 }
diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
index e0df6271facc5..91edc7f83d796 100644
--- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
+++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
@@ -20,7 +20,6 @@ struct active_trip {
 
 struct int34x_thermal_zone {
 	struct acpi_device *adev;
-	struct thermal_trip *trips;
 	int aux_trip_nr;
 	struct thermal_zone_device *zone;
 	struct thermal_zone_device_ops *ops;
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
index d7495571dd5d4..bf47f319e3c6e 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -233,10 +233,6 @@ static int get_trip_temp(struct proc_thermal_pci *pci_info)
 	return temp;
 }
 
-static struct thermal_trip psv_trip = {
-	.type = THERMAL_TRIP_PASSIVE,
-};
-
 static struct thermal_zone_device_ops tzone_ops = {
 	.get_temp = sys_get_curr_temp,
 	.set_trip_temp	= sys_set_trip_temp,
@@ -251,6 +247,9 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
 {
 	struct proc_thermal_device *proc_priv;
 	struct proc_thermal_pci *pci_info;
+	struct thermal_trip psv_trip = {
+		.type = THERMAL_TRIP_PASSIVE,
+	};
 	int irq_flag = 0, irq, ret;
 	bool msi_irq = false;
 
diff --git a/drivers/thermal/intel/intel_pch_thermal.c b/drivers/thermal/intel/intel_pch_thermal.c
index b3905e34c5077..76a552870fe0c 100644
--- a/drivers/thermal/intel/intel_pch_thermal.c
+++ b/drivers/thermal/intel/intel_pch_thermal.c
@@ -84,7 +84,6 @@ struct pch_thermal_device {
 	void __iomem *hw_base;
 	struct pci_dev *pdev;
 	struct thermal_zone_device *tzd;
-	struct thermal_trip trips[PCH_MAX_TRIPS];
 	bool bios_enabled;
 };
 
@@ -94,7 +93,8 @@ struct pch_thermal_device {
  * passive trip temperature using _PSV method. There is no specific
  * passive temperature setting in MMIO interface of this PCI device.
  */
-static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, int trip)
+static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
+				     struct thermal_trip *trip)
 {
 	struct acpi_device *adev;
 	int temp;
@@ -106,12 +106,13 @@ static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, int trip)
 	if (thermal_acpi_passive_trip_temp(adev, &temp) || temp <= 0)
 		return 0;
 
-	ptd->trips[trip].type = THERMAL_TRIP_PASSIVE;
-	ptd->trips[trip].temperature = temp;
+	trip->type = THERMAL_TRIP_PASSIVE;
+	trip->temperature = temp;
 	return 1;
 }
 #else
-static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, int trip)
+static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
+				     struct thermal_trip *trip)
 {
 	return 0;
 }
@@ -159,6 +160,7 @@ static const char *board_names[] = {
 static int intel_pch_thermal_probe(struct pci_dev *pdev,
 				   const struct pci_device_id *id)
 {
+	struct thermal_trip ptd_trips[PCH_MAX_TRIPS] = { 0 };
 	enum pch_board_ids board_id = id->driver_data;
 	struct pch_thermal_device *ptd;
 	int nr_trips = 0;
@@ -220,21 +222,21 @@ static int intel_pch_thermal_probe(struct pci_dev *pdev,
 	trip_temp = readw(ptd->hw_base + WPT_CTT);
 	trip_temp &= 0x1FF;
 	if (trip_temp) {
-		ptd->trips[nr_trips].temperature = GET_WPT_TEMP(trip_temp);
-		ptd->trips[nr_trips++].type = THERMAL_TRIP_CRITICAL;
+		ptd_trips[nr_trips].temperature = GET_WPT_TEMP(trip_temp);
+		ptd_trips[nr_trips++].type = THERMAL_TRIP_CRITICAL;
 	}
 
 	trip_temp = readw(ptd->hw_base + WPT_PHL);
 	trip_temp &= 0x1FF;
 	if (trip_temp) {
-		ptd->trips[nr_trips].temperature = GET_WPT_TEMP(trip_temp);
-		ptd->trips[nr_trips++].type = THERMAL_TRIP_HOT;
+		ptd_trips[nr_trips].temperature = GET_WPT_TEMP(trip_temp);
+		ptd_trips[nr_trips++].type = THERMAL_TRIP_HOT;
 	}
 
-	nr_trips += pch_wpt_add_acpi_psv_trip(ptd, nr_trips);
+	nr_trips += pch_wpt_add_acpi_psv_trip(ptd, &ptd_trips[nr_trips]);
 
 	ptd->tzd = thermal_zone_device_register_with_trips(board_names[board_id],
-							   ptd->trips, nr_trips,
+							   ptd_trips, nr_trips,
 							   0, ptd, &tzd_ops,
 							   NULL, 0, 0);
 	if (IS_ERR(ptd->tzd)) {
diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c
index 646ca8bd40a98..06f6d1468717a 100644
--- a/drivers/thermal/intel/intel_quark_dts_thermal.c
+++ b/drivers/thermal/intel/intel_quark_dts_thermal.c
@@ -105,7 +105,6 @@ struct soc_sensor_entry {
 	u32 store_ptps;
 	u32 store_dts_enable;
 	struct thermal_zone_device *tzone;
-	struct thermal_trip trips[QRK_MAX_DTS_TRIPS];
 };
 
 static struct soc_sensor_entry *soc_dts;
@@ -320,6 +319,7 @@ static void free_soc_dts(struct soc_sensor_entry *aux_entry)
 
 static struct soc_sensor_entry *alloc_soc_dts(void)
 {
+	struct thermal_trip trips[QRK_MAX_DTS_TRIPS] = { 0 };
 	struct soc_sensor_entry *aux_entry;
 	int err;
 	u32 out;
@@ -362,14 +362,14 @@ static struct soc_sensor_entry *alloc_soc_dts(void)
 			goto err_ret;
 	}
 
-	aux_entry->trips[QRK_DTS_ID_TP_CRITICAL].temperature = get_trip_temp(QRK_DTS_ID_TP_CRITICAL);
-	aux_entry->trips[QRK_DTS_ID_TP_CRITICAL].type = THERMAL_TRIP_CRITICAL;
+	trips[QRK_DTS_ID_TP_CRITICAL].temperature = get_trip_temp(QRK_DTS_ID_TP_CRITICAL);
+	trips[QRK_DTS_ID_TP_CRITICAL].type = THERMAL_TRIP_CRITICAL;
 
-	aux_entry->trips[QRK_DTS_ID_TP_HOT].temperature = get_trip_temp(QRK_DTS_ID_TP_HOT);
-	aux_entry->trips[QRK_DTS_ID_TP_HOT].type = THERMAL_TRIP_HOT;
+	trips[QRK_DTS_ID_TP_HOT].temperature = get_trip_temp(QRK_DTS_ID_TP_HOT);
+	trips[QRK_DTS_ID_TP_HOT].type = THERMAL_TRIP_HOT;
 
 	aux_entry->tzone = thermal_zone_device_register_with_trips("quark_dts",
-								   aux_entry->trips,
+								   trips,
 								   QRK_MAX_DTS_TRIPS,
 								   wr_mask,
 								   aux_entry, &tzone_ops,
diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.c b/drivers/thermal/intel/intel_soc_dts_iosf.c
index d00def3c4703e..096cdd3c3b1fa 100644
--- a/drivers/thermal/intel/intel_soc_dts_iosf.c
+++ b/drivers/thermal/intel/intel_soc_dts_iosf.c
@@ -129,22 +129,6 @@ static int update_trip_temp(struct intel_soc_dts_sensors *sensors,
 	return status;
 }
 
-static int configure_trip(struct intel_soc_dts_sensor_entry *dts,
-			  int thres_index, enum thermal_trip_type trip_type,
-			  int temp)
-{
-	int ret;
-
-	ret = update_trip_temp(dts->sensors, thres_index, temp);
-	if (ret)
-		return ret;
-
-	dts->trips[thres_index].temperature = temp;
-	dts->trips[thres_index].type = trip_type;
-
-	return 0;
-}
-
 static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip,
 			     int temp)
 {
@@ -218,6 +202,7 @@ static void remove_dts_thermal_zone(struct intel_soc_dts_sensor_entry *dts)
 }
 
 static int add_dts_thermal_zone(int id, struct intel_soc_dts_sensor_entry *dts,
+				struct thermal_trip *trips,
 				bool critical_trip)
 {
 	int writable_trip_cnt = SOC_MAX_DTS_TRIPS;
@@ -254,7 +239,7 @@ static int add_dts_thermal_zone(int id, struct intel_soc_dts_sensor_entry *dts,
 	}
 	dts->trip_mask = trip_mask;
 	snprintf(name, sizeof(name), "soc_dts%d", id);
-	dts->tzone = thermal_zone_device_register_with_trips(name, dts->trips,
+	dts->tzone = thermal_zone_device_register_with_trips(name, trips,
 							     SOC_MAX_DTS_TRIPS,
 							     trip_mask,
 							     dts, &tzone_ops,
@@ -315,14 +300,15 @@ EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_interrupt_handler);
 
 static void dts_trips_reset(struct intel_soc_dts_sensors *sensors, int dts_index)
 {
-	configure_trip(&sensors->soc_dts[dts_index], 0, 0, 0);
-	configure_trip(&sensors->soc_dts[dts_index], 1, 0, 0);
+	update_trip_temp(sensors, 0, 0);
+	update_trip_temp(sensors, 1, 0);
 }
 
 struct intel_soc_dts_sensors *
 intel_soc_dts_iosf_init(enum intel_soc_dts_interrupt_type intr_type,
 			bool critical_trip, int crit_offset)
 {
+	struct thermal_trip trips[SOC_MAX_DTS_SENSORS][SOC_MAX_DTS_TRIPS] = { 0 };
 	struct intel_soc_dts_sensors *sensors;
 	int tj_max;
 	int ret;
@@ -350,11 +336,13 @@ intel_soc_dts_iosf_init(enum intel_soc_dts_interrupt_type intr_type,
 
 		sensors->soc_dts[i].sensors = sensors;
 
-		ret = configure_trip(&sensors->soc_dts[i], 0,
-				     THERMAL_TRIP_PASSIVE, 0);
+		ret = update_trip_temp(sensors, 0, 0);
 		if (ret)
 			goto err_reset_trips;
 
+		trips[i][0].type = THERMAL_TRIP_PASSIVE;
+		trips[i][0].temperature = 0;
+
 		if (critical_trip) {
 			trip_type = THERMAL_TRIP_CRITICAL;
 			temp = sensors->tj_max - crit_offset;
@@ -362,13 +350,17 @@ intel_soc_dts_iosf_init(enum intel_soc_dts_interrupt_type intr_type,
 			trip_type = THERMAL_TRIP_PASSIVE;
 			temp = 0;
 		}
-		ret = configure_trip(&sensors->soc_dts[i], 1, trip_type, temp);
+		ret = update_trip_temp(sensors, 1, temp);
 		if (ret)
 			goto err_reset_trips;
+
+		trips[i][1].type = trip_type;
+		trips[i][1].temperature = temp;
 	}
 
 	for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
-		ret = add_dts_thermal_zone(i, &sensors->soc_dts[i], critical_trip);
+		ret = add_dts_thermal_zone(i, &sensors->soc_dts[i], trips[i],
+					   critical_trip);
 		if (ret)
 			goto err_remove_zone;
 	}
diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.h b/drivers/thermal/intel/intel_soc_dts_iosf.h
index 162841df0ebe5..da59d719eb9d3 100644
--- a/drivers/thermal/intel/intel_soc_dts_iosf.h
+++ b/drivers/thermal/intel/intel_soc_dts_iosf.h
@@ -29,7 +29,6 @@ struct intel_soc_dts_sensor_entry {
 	int id;
 	u32 store_status;
 	u32 trip_mask;
-	struct thermal_trip trips[SOC_MAX_DTS_TRIPS];
 	struct thermal_zone_device *tzone;
 	struct intel_soc_dts_sensors *sensors;
 };
diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c
index 61c3d450ee605..dafd28a39bcc7 100644
--- a/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@ -53,7 +53,6 @@ struct zone_device {
 	u32				msr_pkg_therm_high;
 	struct delayed_work		work;
 	struct thermal_zone_device	*tzone;
-	struct thermal_trip		*trips;
 	struct cpumask			cpumask;
 };
 
@@ -268,17 +267,13 @@ static int pkg_thermal_notify(u64 msr_val)
 	return 0;
 }
 
-static struct thermal_trip *pkg_temp_thermal_trips_init(int cpu, int tj_max, int num_trips)
+static int pkg_temp_thermal_trips_init(int cpu, int tj_max,
+				       struct thermal_trip *trips, int num_trips)
 {
-	struct thermal_trip *trips;
 	unsigned long thres_reg_value;
 	u32 mask, shift, eax, edx;
 	int ret, i;
 
-	trips = kzalloc(sizeof(*trips) * num_trips, GFP_KERNEL);
-	if (!trips)
-		return ERR_PTR(-ENOMEM);
-
 	for (i = 0; i < num_trips; i++) {
 
 		if (i) {
@@ -291,10 +286,8 @@ static struct thermal_trip *pkg_temp_thermal_trips_init(int cpu, int tj_max, int
 
 		ret = rdmsr_on_cpu(cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT,
 				   &eax, &edx);
-		if (ret < 0) {
-			kfree(trips);
-			return ERR_PTR(ret);
-		}
+		if (ret < 0)
+			return ret;
 
 		thres_reg_value = (eax & mask) >> shift;
 
@@ -307,11 +300,12 @@ static struct thermal_trip *pkg_temp_thermal_trips_init(int cpu, int tj_max, int
 			 __func__, cpu, i, trips[i].temperature);
 	}
 
-	return trips;
+	return 0;
 }
 
 static int pkg_temp_thermal_device_add(unsigned int cpu)
 {
+	struct thermal_trip trips[MAX_NUMBER_OF_TRIPS] = { 0 };
 	int id = topology_logical_die_id(cpu);
 	u32 eax, ebx, ecx, edx;
 	struct zone_device *zonedev;
@@ -336,21 +330,19 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
 	if (!zonedev)
 		return -ENOMEM;
 
-	zonedev->trips = pkg_temp_thermal_trips_init(cpu, tj_max, thres_count);
-	if (IS_ERR(zonedev->trips)) {
-		err = PTR_ERR(zonedev->trips);
+	err = pkg_temp_thermal_trips_init(cpu, tj_max, trips, thres_count);
+	if (err)
 		goto out_kfree_zonedev;
-	}
 
 	INIT_DELAYED_WORK(&zonedev->work, pkg_temp_thermal_threshold_work_fn);
 	zonedev->cpu = cpu;
 	zonedev->tzone = thermal_zone_device_register_with_trips("x86_pkg_temp",
-			zonedev->trips, thres_count,
+			trips, thres_count,
 			(thres_count == MAX_NUMBER_OF_TRIPS) ? 0x03 : 0x01,
 			zonedev, &tzone_ops, &pkg_temp_tz_params, 0, 0);
 	if (IS_ERR(zonedev->tzone)) {
 		err = PTR_ERR(zonedev->tzone);
-		goto out_kfree_trips;
+		goto out_kfree_zonedev;
 	}
 	err = thermal_zone_device_enable(zonedev->tzone);
 	if (err)
@@ -369,8 +361,6 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
 
 out_unregister_tz:
 	thermal_zone_device_unregister(zonedev->tzone);
-out_kfree_trips:
-	kfree(zonedev->trips);
 out_kfree_zonedev:
 	kfree(zonedev);
 	return err;
@@ -457,10 +447,9 @@ static int pkg_thermal_cpu_offline(unsigned int cpu)
 	raw_spin_unlock_irq(&pkg_temp_lock);
 
 	/* Final cleanup if this is the last cpu */
-	if (lastcpu) {
-		kfree(zonedev->trips);
+	if (lastcpu)
 		kfree(zonedev);
-	}
+
 	return 0;
 }
 

From 698a1eb1f75eb6ac957d2af7721a3b1a94281e5d Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 22 Feb 2024 18:18:01 +0100
Subject: [PATCH 04/17] thermal: core: Store zone ops in struct
 thermal_zone_device

The current code requires thermal zone creators to pass pointers to
writable ops structures to thermal_zone_device_register_with_trips()
which needs to modify the target struct thermal_zone_device_ops object
if the "critical" operation in it is NULL.

Moreover, the callers of thermal_zone_device_register_with_trips() are
required to hold on to the struct thermal_zone_device_ops object passed
to it until the given thermal zone is unregistered.

Both of these requirements are quite inconvenient, so modify struct
thermal_zone_device to contain struct thermal_zone_device_ops as field and
make thermal_zone_device_register_with_trips() copy the contents of the
struct thermal_zone_device_ops passed to it via a pointer (which can be
const now) to that field.

Also adjust the code using thermal zone ops accordingly and modify
thermal_of_zone_register() to use a local ops variable during
thermal zone registration so ops do not need to be freed in
thermal_of_zone_unregister() any more.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/thermal/thermal_core.c    | 40 +++++++++++++++----------------
 drivers/thermal/thermal_helpers.c | 10 ++++----
 drivers/thermal/thermal_hwmon.c   |  4 ++--
 drivers/thermal/thermal_of.c      | 27 +++++++--------------
 drivers/thermal/thermal_sysfs.c   | 14 +++++------
 drivers/thermal/thermal_trip.c    |  4 ++--
 include/linux/thermal.h           |  8 +++----
 7 files changed, 48 insertions(+), 59 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 8bdece8b15368..bb21f78b4bfa4 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -356,9 +356,9 @@ static void handle_critical_trips(struct thermal_zone_device *tz,
 	trace_thermal_zone_trip(tz, thermal_zone_trip_id(tz, trip), trip->type);
 
 	if (trip->type == THERMAL_TRIP_CRITICAL)
-		tz->ops->critical(tz);
-	else if (tz->ops->hot)
-		tz->ops->hot(tz);
+		tz->ops.critical(tz);
+	else if (tz->ops.hot)
+		tz->ops.hot(tz);
 }
 
 static void handle_thermal_trip(struct thermal_zone_device *tz,
@@ -493,8 +493,8 @@ static int thermal_zone_device_set_mode(struct thermal_zone_device *tz,
 		return ret;
 	}
 
-	if (tz->ops->change_mode)
-		ret = tz->ops->change_mode(tz, mode);
+	if (tz->ops.change_mode)
+		ret = tz->ops.change_mode(tz, mode);
 
 	if (!ret)
 		tz->mode = mode;
@@ -867,8 +867,8 @@ static void bind_cdev(struct thermal_cooling_device *cdev)
 	struct thermal_zone_device *pos = NULL;
 
 	list_for_each_entry(pos, &thermal_tz_list, node) {
-		if (pos->ops->bind) {
-			ret = pos->ops->bind(pos, cdev);
+		if (pos->ops.bind) {
+			ret = pos->ops.bind(pos, cdev);
 			if (ret)
 				print_bind_err_msg(pos, cdev, ret);
 		}
@@ -1184,8 +1184,8 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
 
 	/* Unbind all thermal zones associated with 'this' cdev */
 	list_for_each_entry(tz, &thermal_tz_list, node) {
-		if (tz->ops->unbind)
-			tz->ops->unbind(tz, cdev);
+		if (tz->ops.unbind)
+			tz->ops.unbind(tz, cdev);
 	}
 
 	mutex_unlock(&thermal_list_lock);
@@ -1199,13 +1199,13 @@ static void bind_tz(struct thermal_zone_device *tz)
 	int ret;
 	struct thermal_cooling_device *pos = NULL;
 
-	if (!tz->ops->bind)
+	if (!tz->ops.bind)
 		return;
 
 	mutex_lock(&thermal_list_lock);
 
 	list_for_each_entry(pos, &thermal_cdev_list, node) {
-		ret = tz->ops->bind(tz, pos);
+		ret = tz->ops.bind(tz, pos);
 		if (ret)
 			print_bind_err_msg(tz, pos, ret);
 	}
@@ -1224,8 +1224,8 @@ int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp)
 {
 	int i, ret = -EINVAL;
 
-	if (tz->ops->get_crit_temp)
-		return tz->ops->get_crit_temp(tz, temp);
+	if (tz->ops.get_crit_temp)
+		return tz->ops.get_crit_temp(tz, temp);
 
 	mutex_lock(&tz->lock);
 
@@ -1273,7 +1273,7 @@ thermal_zone_device_register_with_trips(const char *type,
 					const struct thermal_trip *trips,
 					int num_trips, int mask,
 					void *devdata,
-					struct thermal_zone_device_ops *ops,
+					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp,
 					int passive_delay, int polling_delay)
 {
@@ -1348,10 +1348,10 @@ thermal_zone_device_register_with_trips(const char *type,
 	tz->id = id;
 	strscpy(tz->type, type, sizeof(tz->type));
 
-	if (!ops->critical)
-		ops->critical = thermal_zone_device_critical;
+	tz->ops = *ops;
+	if (!tz->ops.critical)
+		tz->ops.critical = thermal_zone_device_critical;
 
-	tz->ops = ops;
 	tz->device.class = thermal_class;
 	tz->devdata = devdata;
 	memcpy(tz->trips, trips, num_trips * sizeof(*trips));
@@ -1437,7 +1437,7 @@ EXPORT_SYMBOL_GPL(thermal_zone_device_register_with_trips);
 struct thermal_zone_device *thermal_tripless_zone_device_register(
 					const char *type,
 					void *devdata,
-					struct thermal_zone_device_ops *ops,
+					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp)
 {
 	return thermal_zone_device_register_with_trips(type, NULL, 0, 0, devdata,
@@ -1499,8 +1499,8 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
 
 	/* Unbind all cdevs associated with 'this' thermal zone */
 	list_for_each_entry(cdev, &thermal_cdev_list, node)
-		if (tz->ops->unbind)
-			tz->ops->unbind(tz, cdev);
+		if (tz->ops.unbind)
+			tz->ops.unbind(tz, cdev);
 
 	mutex_unlock(&thermal_list_lock);
 
diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c
index 0329f4a71b020..c5a057b59c42d 100644
--- a/drivers/thermal/thermal_helpers.c
+++ b/drivers/thermal/thermal_helpers.c
@@ -26,8 +26,8 @@ int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip
 {
 	enum thermal_trend trend;
 
-	if (tz->emul_temperature || !tz->ops->get_trend ||
-	    tz->ops->get_trend(tz, trip, &trend)) {
+	if (tz->emul_temperature || !tz->ops.get_trend ||
+	    tz->ops.get_trend(tz, trip, &trend)) {
 		if (tz->temperature > tz->last_temperature)
 			trend = THERMAL_TREND_RAISING;
 		else if (tz->temperature < tz->last_temperature)
@@ -75,7 +75,7 @@ EXPORT_SYMBOL(get_thermal_instance);
  * temperature and fill @temp.
  *
  * Both tz and tz->ops must be valid pointers when calling this function,
- * and the tz->ops->get_temp callback must be provided.
+ * and the tz->ops.get_temp callback must be provided.
  * The function must be called under tz->lock.
  *
  * Return: On success returns 0, an error code otherwise
@@ -88,7 +88,7 @@ int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
 
 	lockdep_assert_held(&tz->lock);
 
-	ret = tz->ops->get_temp(tz, temp);
+	ret = tz->ops.get_temp(tz, temp);
 
 	if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz->emul_temperature) {
 		for_each_trip(tz, trip) {
@@ -132,7 +132,7 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
 
 	mutex_lock(&tz->lock);
 
-	if (!tz->ops->get_temp) {
+	if (!tz->ops.get_temp) {
 		ret = -EINVAL;
 		goto unlock;
 	}
diff --git a/drivers/thermal/thermal_hwmon.c b/drivers/thermal/thermal_hwmon.c
index 252116f1e5354..f0e504fd866ae 100644
--- a/drivers/thermal/thermal_hwmon.c
+++ b/drivers/thermal/thermal_hwmon.c
@@ -80,7 +80,7 @@ temp_crit_show(struct device *dev, struct device_attribute *attr, char *buf)
 
 	mutex_lock(&tz->lock);
 
-	ret = tz->ops->get_crit_temp(tz, &temperature);
+	ret = tz->ops.get_crit_temp(tz, &temperature);
 
 	mutex_unlock(&tz->lock);
 
@@ -132,7 +132,7 @@ thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon,
 static bool thermal_zone_crit_temp_valid(struct thermal_zone_device *tz)
 {
 	int temp;
-	return tz->ops->get_crit_temp && !tz->ops->get_crit_temp(tz, &temp);
+	return tz->ops.get_crit_temp && !tz->ops.get_crit_temp(tz, &temp);
 }
 
 int thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 20fa7d5ac536b..405743e905318 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -438,11 +438,8 @@ static int thermal_of_unbind(struct thermal_zone_device *tz,
  */
 static void thermal_of_zone_unregister(struct thermal_zone_device *tz)
 {
-	struct thermal_zone_device_ops *ops = tz->ops;
-
 	thermal_zone_device_disable(tz);
 	thermal_zone_device_unregister(tz);
-	kfree(ops);
 }
 
 /**
@@ -468,33 +465,27 @@ static void thermal_of_zone_unregister(struct thermal_zone_device *tz)
 static struct thermal_zone_device *thermal_of_zone_register(struct device_node *sensor, int id, void *data,
 							    const struct thermal_zone_device_ops *ops)
 {
+	struct thermal_zone_device_ops of_ops = *ops;
 	struct thermal_zone_device *tz;
 	struct thermal_trip *trips;
 	struct thermal_zone_params tzp = {};
-	struct thermal_zone_device_ops *of_ops;
 	struct device_node *np;
 	const char *action;
 	int delay, pdelay;
 	int ntrips, mask;
 	int ret;
 
-	of_ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL);
-	if (!of_ops)
-		return ERR_PTR(-ENOMEM);
-
 	np = of_thermal_zone_find(sensor, id);
 	if (IS_ERR(np)) {
 		if (PTR_ERR(np) != -ENODEV)
 			pr_err("Failed to find thermal zone for %pOFn id=%d\n", sensor, id);
-		ret = PTR_ERR(np);
-		goto out_kfree_of_ops;
+		return ERR_CAST(np);
 	}
 
 	trips = thermal_of_trips_init(np, &ntrips);
 	if (IS_ERR(trips)) {
 		pr_err("Failed to find trip points for %pOFn id=%d\n", sensor, id);
-		ret = PTR_ERR(trips);
-		goto out_kfree_of_ops;
+		return ERR_CAST(trips);
 	}
 
 	ret = thermal_of_monitor_init(np, &delay, &pdelay);
@@ -505,18 +496,18 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node *
 
 	thermal_of_parameters_init(np, &tzp);
 
-	of_ops->bind = thermal_of_bind;
-	of_ops->unbind = thermal_of_unbind;
+	of_ops.bind = thermal_of_bind;
+	of_ops.unbind = thermal_of_unbind;
 
 	mask = GENMASK_ULL((ntrips) - 1, 0);
 
 	ret = of_property_read_string(np, "critical-action", &action);
 	if (!ret)
-		if (!of_ops->critical && !strcasecmp(action, "reboot"))
-			of_ops->critical = thermal_zone_device_critical_reboot;
+		if (!of_ops.critical && !strcasecmp(action, "reboot"))
+			of_ops.critical = thermal_zone_device_critical_reboot;
 
 	tz = thermal_zone_device_register_with_trips(np->name, trips, ntrips,
-						     mask, data, of_ops, &tzp,
+						     mask, data, &of_ops, &tzp,
 						     pdelay, delay);
 	if (IS_ERR(tz)) {
 		ret = PTR_ERR(tz);
@@ -538,8 +529,6 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node *
 
 out_kfree_trips:
 	kfree(trips);
-out_kfree_of_ops:
-	kfree(of_ops);
 
 	return ERR_PTR(ret);
 }
diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index d55f9303afb5b..2eace6b33b8cb 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -123,8 +123,8 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
 	trip = &tz->trips[trip_id];
 
 	if (temp != trip->temperature) {
-		if (tz->ops->set_trip_temp) {
-			ret = tz->ops->set_trip_temp(tz, trip_id, temp);
+		if (tz->ops.set_trip_temp) {
+			ret = tz->ops.set_trip_temp(tz, trip_id, temp);
 			if (ret)
 				goto unlock;
 		}
@@ -174,8 +174,8 @@ trip_point_hyst_store(struct device *dev, struct device_attribute *attr,
 	trip = &tz->trips[trip_id];
 
 	if (hyst != trip->hysteresis) {
-		if (tz->ops->set_trip_hyst) {
-			ret = tz->ops->set_trip_hyst(tz, trip_id, hyst);
+		if (tz->ops.set_trip_hyst) {
+			ret = tz->ops.set_trip_hyst(tz, trip_id, hyst);
 			if (ret)
 				goto unlock;
 		}
@@ -250,10 +250,10 @@ emul_temp_store(struct device *dev, struct device_attribute *attr,
 
 	mutex_lock(&tz->lock);
 
-	if (!tz->ops->set_emul_temp)
+	if (!tz->ops.set_emul_temp)
 		tz->emul_temperature = temperature;
 	else
-		ret = tz->ops->set_emul_temp(tz, temperature);
+		ret = tz->ops.set_emul_temp(tz, temperature);
 
 	if (!ret)
 		__thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
@@ -474,7 +474,7 @@ static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
 					tz->trip_hyst_attrs[indx].name;
 		tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO;
 		tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show;
-		if (tz->ops->set_trip_hyst) {
+		if (tz->ops.set_trip_hyst) {
 			tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR;
 			tz->trip_hyst_attrs[indx].attr.store =
 					trip_point_hyst_store;
diff --git a/drivers/thermal/thermal_trip.c b/drivers/thermal/thermal_trip.c
index a80ca78f8473d..09f6050dd0416 100644
--- a/drivers/thermal/thermal_trip.c
+++ b/drivers/thermal/thermal_trip.c
@@ -70,7 +70,7 @@ void __thermal_zone_set_trips(struct thermal_zone_device *tz)
 
 	lockdep_assert_held(&tz->lock);
 
-	if (!tz->ops->set_trips)
+	if (!tz->ops.set_trips)
 		return;
 
 	for_each_trip(tz, trip) {
@@ -114,7 +114,7 @@ void __thermal_zone_set_trips(struct thermal_zone_device *tz)
 	 * Set a temperature window. When this window is left the driver
 	 * must inform the thermal core via thermal_zone_device_update.
 	 */
-	ret = tz->ops->set_trips(tz, low, high);
+	ret = tz->ops.set_trips(tz, low, high);
 	if (ret)
 		dev_err(&tz->device, "Failed to set trips: %d\n", ret);
 }
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 572a24f29a106..ec0559e98d6fc 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -182,7 +182,7 @@ struct thermal_zone_device {
 	int prev_low_trip;
 	int prev_high_trip;
 	atomic_t need_update;
-	struct thermal_zone_device_ops *ops;
+	struct thermal_zone_device_ops ops;
 	struct thermal_zone_params *tzp;
 	struct thermal_governor *governor;
 	void *governor_data;
@@ -318,14 +318,14 @@ struct thermal_zone_device *thermal_zone_device_register_with_trips(
 					const struct thermal_trip *trips,
 					int num_trips, int mask,
 					void *devdata,
-					struct thermal_zone_device_ops *ops,
+					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp,
 					int passive_delay, int polling_delay);
 
 struct thermal_zone_device *thermal_tripless_zone_device_register(
 					const char *type,
 					void *devdata,
-					struct thermal_zone_device_ops *ops,
+					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp);
 
 void thermal_zone_device_unregister(struct thermal_zone_device *tz);
@@ -378,7 +378,7 @@ static inline struct thermal_zone_device *thermal_zone_device_register_with_trip
 					const struct thermal_trip *trips,
 					int num_trips, int mask,
 					void *devdata,
-					struct thermal_zone_device_ops *ops,
+					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp,
 					int passive_delay, int polling_delay)
 { return ERR_PTR(-ENODEV); }

From 75fb8714728460c4584c72e2f6410944a0b2cc44 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Wed, 14 Feb 2024 13:48:34 +0100
Subject: [PATCH 05/17] thermal: ACPI: Constify acpi_thermal_zone_ops

Because thermal zone operations are now stored directly in struct
thermal_zone_device, acpi_thermal_zone_ops need not be modified by
the thermal core and so it can be const.

Adjust the code accordingly.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/acpi/thermal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 6c4ba00d60e21..8042e96016e65 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -620,7 +620,7 @@ acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
 	return acpi_thermal_bind_unbind_cdev(thermal, cdev, false);
 }
 
-static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
+static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
 	.bind = acpi_thermal_bind_cooling_device,
 	.unbind	= acpi_thermal_unbind_cooling_device,
 	.get_temp = thermal_get_temp,

From 62dd17846d33e75e623965e281e246dff0e01309 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 5 Feb 2024 22:20:32 +0100
Subject: [PATCH 06/17] thermal: intel: Adjust ops handling during thermal zone
 registration

Because thermal zone operations are now stored directly in struct
thermal_zone_device, thermal zone creators can discard the operations
structure after the zone registration is complete, or it can be made
read-only.

Accordingly, make int340x_thermal_zone_add() use a local variable to
represent thermal zone operations, so it is freed automatically upon the
function exit, and make the other Intel thermal drivers use const zone
operations structures.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 .../int340x_thermal/int340x_thermal_zone.c    | 26 +++++--------------
 .../int340x_thermal/int340x_thermal_zone.h    |  1 -
 .../processor_thermal_device_pci.c            |  2 +-
 drivers/thermal/intel/intel_pch_thermal.c     |  2 +-
 .../thermal/intel/intel_quark_dts_thermal.c   |  2 +-
 drivers/thermal/intel/intel_soc_dts_iosf.c    |  2 +-
 drivers/thermal/intel/x86_pkg_temp_thermal.c  |  2 +-
 7 files changed, 11 insertions(+), 26 deletions(-)

diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
index 950e91ca5f425..1b0a9e9206c4d 100644
--- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
+++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -61,12 +61,6 @@ static void int340x_thermal_critical(struct thermal_zone_device *zone)
 	dev_dbg(&zone->device, "%s: critical temperature reached\n", zone->type);
 }
 
-static struct thermal_zone_device_ops int340x_thermal_zone_ops = {
-	.get_temp       = int340x_thermal_get_zone_temp,
-	.set_trip_temp	= int340x_thermal_set_trip_temp,
-	.critical	= int340x_thermal_critical,
-};
-
 static inline void *int_to_trip_priv(int i)
 {
 	return (void *)(long)i;
@@ -126,6 +120,11 @@ static struct thermal_zone_params int340x_thermal_params = {
 struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 						     int (*get_temp) (struct thermal_zone_device *, int *))
 {
+	const struct thermal_zone_device_ops zone_ops = {
+		.set_trip_temp = int340x_thermal_set_trip_temp,
+		.critical = int340x_thermal_critical,
+		.get_temp = get_temp ? get_temp : int340x_thermal_get_zone_temp,
+	};
 	struct int34x_thermal_zone *int34x_zone;
 	struct thermal_trip *zone_trips;
 	unsigned long long trip_cnt = 0;
@@ -140,16 +139,6 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 
 	int34x_zone->adev = adev;
 
-	int34x_zone->ops = kmemdup(&int340x_thermal_zone_ops,
-				   sizeof(int340x_thermal_zone_ops), GFP_KERNEL);
-	if (!int34x_zone->ops) {
-		ret = -ENOMEM;
-		goto err_ops_alloc;
-	}
-
-	if (get_temp)
-		int34x_zone->ops->get_temp = get_temp;
-
 	status = acpi_evaluate_integer(adev->handle, "PATC", NULL, &trip_cnt);
 	if (ACPI_SUCCESS(status)) {
 		int34x_zone->aux_trip_nr = trip_cnt;
@@ -185,7 +174,7 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 							acpi_device_bid(adev),
 							zone_trips, trip_cnt,
 							trip_mask, int34x_zone,
-							int34x_zone->ops,
+							&zone_ops,
 							&int340x_thermal_params,
 							0, 0);
 	kfree(zone_trips);
@@ -205,8 +194,6 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 err_thermal_zone:
 	acpi_lpat_free_conversion_table(int34x_zone->lpat_table);
 err_trips_alloc:
-	kfree(int34x_zone->ops);
-err_ops_alloc:
 	kfree(int34x_zone);
 	return ERR_PTR(ret);
 }
@@ -216,7 +203,6 @@ void int340x_thermal_zone_remove(struct int34x_thermal_zone *int34x_zone)
 {
 	thermal_zone_device_unregister(int34x_zone->zone);
 	acpi_lpat_free_conversion_table(int34x_zone->lpat_table);
-	kfree(int34x_zone->ops);
 	kfree(int34x_zone);
 }
 EXPORT_SYMBOL_GPL(int340x_thermal_zone_remove);
diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
index 91edc7f83d796..d504e271009aa 100644
--- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
+++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
@@ -22,7 +22,6 @@ struct int34x_thermal_zone {
 	struct acpi_device *adev;
 	int aux_trip_nr;
 	struct thermal_zone_device *zone;
-	struct thermal_zone_device_ops *ops;
 	void *priv_data;
 	struct acpi_lpat_conversion_table *lpat_table;
 };
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
index bf47f319e3c6e..8ff7e914ecf8e 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -233,7 +233,7 @@ static int get_trip_temp(struct proc_thermal_pci *pci_info)
 	return temp;
 }
 
-static struct thermal_zone_device_ops tzone_ops = {
+static const struct thermal_zone_device_ops tzone_ops = {
 	.get_temp = sys_get_curr_temp,
 	.set_trip_temp	= sys_set_trip_temp,
 };
diff --git a/drivers/thermal/intel/intel_pch_thermal.c b/drivers/thermal/intel/intel_pch_thermal.c
index 76a552870fe0c..8bfb221e57e75 100644
--- a/drivers/thermal/intel/intel_pch_thermal.c
+++ b/drivers/thermal/intel/intel_pch_thermal.c
@@ -132,7 +132,7 @@ static void pch_critical(struct thermal_zone_device *tzd)
 		thermal_zone_device_type(tzd));
 }
 
-static struct thermal_zone_device_ops tzd_ops = {
+static const struct thermal_zone_device_ops tzd_ops = {
 	.get_temp = pch_thermal_get_temp,
 	.critical = pch_critical,
 };
diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c
index 06f6d1468717a..210b822bc988e 100644
--- a/drivers/thermal/intel/intel_quark_dts_thermal.c
+++ b/drivers/thermal/intel/intel_quark_dts_thermal.c
@@ -292,7 +292,7 @@ static int sys_change_mode(struct thermal_zone_device *tzd,
 	return ret;
 }
 
-static struct thermal_zone_device_ops tzone_ops = {
+static const struct thermal_zone_device_ops tzone_ops = {
 	.get_temp = sys_get_curr_temp,
 	.set_trip_temp = sys_set_trip_temp,
 	.change_mode = sys_change_mode,
diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.c b/drivers/thermal/intel/intel_soc_dts_iosf.c
index 096cdd3c3b1fa..c008eb42d82ed 100644
--- a/drivers/thermal/intel/intel_soc_dts_iosf.c
+++ b/drivers/thermal/intel/intel_soc_dts_iosf.c
@@ -168,7 +168,7 @@ static int sys_get_curr_temp(struct thermal_zone_device *tzd,
 	return 0;
 }
 
-static struct thermal_zone_device_ops tzone_ops = {
+static const struct thermal_zone_device_ops tzone_ops = {
 	.get_temp = sys_get_curr_temp,
 	.set_trip_temp = sys_set_trip_temp,
 };
diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c
index dafd28a39bcc7..20cb21cb97c15 100644
--- a/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@ -166,7 +166,7 @@ sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
 }
 
 /* Thermal zone callback registry */
-static struct thermal_zone_device_ops tzone_ops = {
+static const struct thermal_zone_device_ops tzone_ops = {
 	.get_temp = sys_get_curr_temp,
 	.set_trip_temp = sys_set_trip_temp,
 };

From a85739c8c6894c3b9ff860e79e91db44cb59bd63 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 12 Feb 2024 19:26:25 +0100
Subject: [PATCH 07/17] thermal: Get rid of CONFIG_THERMAL_WRITABLE_TRIPS

The only difference made by CONFIG_THERMAL_WRITABLE_TRIPS is whether or
not the writable trips mask passed during thermal zone registration
will take any effect, but whoever passes a non-zero writable trips mask
to thermal_zone_device_register_with_trips() can be forgiven thinking
that it will always work.

Moreover, some thermal drivers expect user space to set trip temperature
values, so they select CONFIG_THERMAL_WRITABLE_TRIPS, possibly overriding
a manual choice to unset it and going against the design purportedly
allowing system integrators to decide on the writability of trip points
for the given kernel build.  It is also set in one platform's defconfig.

Forthermore, CONFIG_THERMAL_WRITABLE_TRIPS only affects trip temperature,
because trip hysteresis is writable as long as the thermal zone provides
a callback to update it, regardless of the CONFIG_THERMAL_WRITABLE_TRIPS
value.

The above means that the symbol in question is used inconsistently and
its purpose is at least moot, so remove it and always take the writable
trip mask passed to thermal_zone_device_register_with_trips() into
account.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 arch/arm/configs/imx_v6_v7_defconfig |  1 -
 drivers/thermal/Kconfig              | 11 -----------
 drivers/thermal/intel/Kconfig        |  2 --
 drivers/thermal/thermal_sysfs.c      |  3 +--
 4 files changed, 1 insertion(+), 16 deletions(-)

diff --git a/arch/arm/configs/imx_v6_v7_defconfig b/arch/arm/configs/imx_v6_v7_defconfig
index 0a90583f9f017..ae20dc002dcaf 100644
--- a/arch/arm/configs/imx_v6_v7_defconfig
+++ b/arch/arm/configs/imx_v6_v7_defconfig
@@ -228,7 +228,6 @@ CONFIG_SENSORS_IIO_HWMON=y
 CONFIG_SENSORS_PWM_FAN=y
 CONFIG_SENSORS_SY7636A=y
 CONFIG_THERMAL_STATISTICS=y
-CONFIG_THERMAL_WRITABLE_TRIPS=y
 CONFIG_CPU_THERMAL=y
 CONFIG_IMX_THERMAL=y
 CONFIG_WATCHDOG=y
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 17a8ae5e991d0..204ed89a3ec9a 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -83,17 +83,6 @@ config THERMAL_OF
 	  Say 'Y' here if you need to build thermal infrastructure
 	  based on device tree.
 
-config THERMAL_WRITABLE_TRIPS
-	bool "Enable writable trip points"
-	help
-	  This option allows the system integrator to choose whether
-	  trip temperatures can be changed from userspace. The
-	  writable trips need to be specified when setting up the
-	  thermal zone but the choice here takes precedence.
-
-	  Say 'Y' here if you would like to allow userspace tools to
-	  change trip temperatures.
-
 choice
 	prompt "Default Thermal governor"
 	default THERMAL_DEFAULT_GOV_STEP_WISE
diff --git a/drivers/thermal/intel/Kconfig b/drivers/thermal/intel/Kconfig
index b43953b5539f6..a31f2f32996af 100644
--- a/drivers/thermal/intel/Kconfig
+++ b/drivers/thermal/intel/Kconfig
@@ -23,7 +23,6 @@ config X86_PKG_TEMP_THERMAL
 	tristate "X86 package temperature thermal driver"
 	depends on X86_THERMAL_VECTOR
 	select THERMAL_GOV_USER_SPACE
-	select THERMAL_WRITABLE_TRIPS
 	select INTEL_TCC
 	default m
 	help
@@ -47,7 +46,6 @@ config INTEL_SOC_DTS_THERMAL
 	tristate "Intel SoCs DTS thermal driver"
 	depends on X86 && PCI && ACPI
 	select INTEL_SOC_DTS_IOSF_CORE
-	select THERMAL_WRITABLE_TRIPS
 	help
 	  Enable this to register Intel SoCs (e.g. Bay Trail) platform digital
 	  temperature sensor (DTS). These SoCs have two additional DTSs in
diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index 2eace6b33b8cb..83914aa2248b6 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -458,8 +458,7 @@ static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
 						tz->trip_temp_attrs[indx].name;
 		tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO;
 		tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show;
-		if (IS_ENABLED(CONFIG_THERMAL_WRITABLE_TRIPS) &&
-		    mask & (1 << indx)) {
+		if (mask & (1 << indx)) {
 			tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR;
 			tz->trip_temp_attrs[indx].attr.store =
 							trip_point_temp_store;

From da1983355ccefcfb3f8eb410fff82e250fa87e39 Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <nathan@kernel.org>
Date: Mon, 26 Feb 2024 17:54:58 -0700
Subject: [PATCH 08/17] thermal: core: Move initial num_trips assignment before
 memcpy()

When booting a CONFIG_FORTIFY_SOURCE=y kernel compiled with a toolchain
that supports __counted_by() (such as clang-18 and newer), there is a
panic on boot:

  [    2.913770] memcpy: detected buffer overflow: 72 byte write of buffer size 0
  [    2.920834] WARNING: CPU: 2 PID: 1 at lib/string_helpers.c:1027 __fortify_report+0x5c/0x74
  ...
  [    3.039208] Call trace:
  [    3.041643]  __fortify_report+0x5c/0x74
  [    3.045469]  __fortify_panic+0x18/0x20
  [    3.049209]  thermal_zone_device_register_with_trips+0x4c8/0x4f8

This panic occurs because trips is counted by num_trips but num_trips is
assigned after the call to memcpy(), so the fortify checks think the
buffer size is zero because tz was allocated with kzalloc().

Move the num_trips assignment before the memcpy() to resolve the panic
and ensure that the fortify checks work properly.

Fixes: 9b0a62758665 ("thermal: core: Store zone trips table in struct thermal_zone_device")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/thermal/thermal_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index bb21f78b4bfa4..1eabc8ebe27d3 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1354,8 +1354,8 @@ thermal_zone_device_register_with_trips(const char *type,
 
 	tz->device.class = thermal_class;
 	tz->devdata = devdata;
-	memcpy(tz->trips, trips, num_trips * sizeof(*trips));
 	tz->num_trips = num_trips;
+	memcpy(tz->trips, trips, num_trips * sizeof(*trips));
 
 	thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay);
 	thermal_set_delay_jiffies(&tz->polling_delay_jiffies, polling_delay);

From 5340f7647294fa8ff8cf5a1bee326b2bd8340e27 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 22 Feb 2024 18:30:49 +0100
Subject: [PATCH 09/17] thermal: core: Add flags to struct thermal_trip

In order to allow thermal zone creators to specify the writability of
trip point temperature and hysteresis on a per-trip basis, add a flags
field to struct thermal_trip and define flags to represent the desired
trip properties.

Also make thermal_zone_device_register_with_trips() set the
THERMAL_TRIP_FLAG_RW_TEMP flag for all trips covered by the writable
trips mask passed to it and modify the thermal sysfs code to look at
the trip flags instead of using the writable trips mask directly or
checking the presence of the .set_trip_hyst() zone callback.

Additionally, make trip_point_temp_store() and trip_point_hyst_store()
fail with an error code if the trip passed to one of them has
THERMAL_TRIP_FLAG_RW_TEMP or THERMAL_TRIP_FLAG_RW_HYST,
respectively, clear in its flags.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/thermal/thermal_core.c  |  9 ++++++++-
 drivers/thermal/thermal_core.h  |  2 +-
 drivers/thermal/thermal_sysfs.c | 18 +++++++++---------
 include/linux/thermal.h         |  8 ++++++++
 4 files changed, 26 insertions(+), 11 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 1eabc8ebe27d3..2ab495220c6ef 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1278,6 +1278,7 @@ thermal_zone_device_register_with_trips(const char *type,
 					int passive_delay, int polling_delay)
 {
 	struct thermal_zone_device *tz;
+	struct thermal_trip *trip;
 	int id;
 	int result;
 	struct thermal_governor *governor;
@@ -1356,13 +1357,19 @@ thermal_zone_device_register_with_trips(const char *type,
 	tz->devdata = devdata;
 	tz->num_trips = num_trips;
 	memcpy(tz->trips, trips, num_trips * sizeof(*trips));
+	for_each_trip(tz, trip) {
+		if (mask & 1)
+			trip->flags |= THERMAL_TRIP_FLAG_RW_TEMP;
+
+		mask >>= 1;
+	}
 
 	thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay);
 	thermal_set_delay_jiffies(&tz->polling_delay_jiffies, polling_delay);
 
 	/* sys I/F */
 	/* Add nodes that are always present via .groups */
-	result = thermal_zone_create_device_groups(tz, mask);
+	result = thermal_zone_create_device_groups(tz);
 	if (result)
 		goto remove_id;
 
diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
index e9c099ecdd0fb..0d8a42bb7ce83 100644
--- a/drivers/thermal/thermal_core.h
+++ b/drivers/thermal/thermal_core.h
@@ -131,7 +131,7 @@ void thermal_zone_trip_updated(struct thermal_zone_device *tz,
 int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
 
 /* sysfs I/F */
-int thermal_zone_create_device_groups(struct thermal_zone_device *, int);
+int thermal_zone_create_device_groups(struct thermal_zone_device *tz);
 void thermal_zone_destroy_device_groups(struct thermal_zone_device *);
 void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *);
 void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev);
diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index 83914aa2248b6..39dbbdac75d08 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -392,17 +392,16 @@ static const struct attribute_group *thermal_zone_attribute_groups[] = {
 /**
  * create_trip_attrs() - create attributes for trip points
  * @tz:		the thermal zone device
- * @mask:	Writeable trip point bitmap.
  *
  * helper function to instantiate sysfs entries for every trip
  * point and its properties of a struct thermal_zone_device.
  *
  * Return: 0 on success, the proper error value otherwise.
  */
-static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
+static int create_trip_attrs(struct thermal_zone_device *tz)
 {
+	const struct thermal_trip *trip;
 	struct attribute **attrs;
-	int indx;
 
 	/* This function works only for zones with at least one trip */
 	if (tz->num_trips <= 0)
@@ -437,7 +436,9 @@ static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
 		return -ENOMEM;
 	}
 
-	for (indx = 0; indx < tz->num_trips; indx++) {
+	for_each_trip(tz, trip) {
+		int indx = thermal_zone_trip_id(tz, trip);
+
 		/* create trip type attribute */
 		snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH,
 			 "trip_point_%d_type", indx);
@@ -458,7 +459,7 @@ static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
 						tz->trip_temp_attrs[indx].name;
 		tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO;
 		tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show;
-		if (mask & (1 << indx)) {
+		if (trip->flags & THERMAL_TRIP_FLAG_RW_TEMP) {
 			tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR;
 			tz->trip_temp_attrs[indx].attr.store =
 							trip_point_temp_store;
@@ -473,7 +474,7 @@ static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
 					tz->trip_hyst_attrs[indx].name;
 		tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO;
 		tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show;
-		if (tz->ops.set_trip_hyst) {
+		if (trip->flags & THERMAL_TRIP_FLAG_RW_HYST) {
 			tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR;
 			tz->trip_hyst_attrs[indx].attr.store =
 					trip_point_hyst_store;
@@ -505,8 +506,7 @@ static void destroy_trip_attrs(struct thermal_zone_device *tz)
 	kfree(tz->trips_attribute_group.attrs);
 }
 
-int thermal_zone_create_device_groups(struct thermal_zone_device *tz,
-				      int mask)
+int thermal_zone_create_device_groups(struct thermal_zone_device *tz)
 {
 	const struct attribute_group **groups;
 	int i, size, result;
@@ -522,7 +522,7 @@ int thermal_zone_create_device_groups(struct thermal_zone_device *tz,
 		groups[i] = thermal_zone_attribute_groups[i];
 
 	if (tz->num_trips) {
-		result = create_trip_attrs(tz, mask);
+		result = create_trip_attrs(tz);
 		if (result) {
 			kfree(groups);
 
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index ec0559e98d6fc..6eb6f3297ea00 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -64,15 +64,23 @@ enum thermal_notify_event {
  * @threshold: trip crossing notification threshold miliCelsius
  * @type: trip point type
  * @priv: pointer to driver data associated with this trip
+ * @flags: flags representing binary properties of the trip
  */
 struct thermal_trip {
 	int temperature;
 	int hysteresis;
 	int threshold;
 	enum thermal_trip_type type;
+	u8 flags;
 	void *priv;
 };
 
+#define THERMAL_TRIP_FLAG_RW_TEMP	BIT(0)
+#define THERMAL_TRIP_FLAG_RW_HYST	BIT(1)
+
+#define THERMAL_TRIP_FLAG_RW	(THERMAL_TRIP_FLAG_RW_TEMP | \
+				 THERMAL_TRIP_FLAG_RW_HYST)
+
 struct thermal_zone_device_ops {
 	int (*bind) (struct thermal_zone_device *,
 		     struct thermal_cooling_device *);

From 46f5bef8ec2e1e05ad2fda0bcf5ac32e191ec694 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 22 Feb 2024 18:32:03 +0100
Subject: [PATCH 10/17] thermal: core: Drop the .set_trip_hyst() thermal zone
 operation

None of the users of the thermal core provides a .set_trip_hyst()
thermal zone operation, so drop that callback from struct
thermal_zone_device_ops and update trip_point_hyst_store()
accordingly.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/thermal/thermal_sysfs.c | 7 -------
 include/linux/thermal.h         | 1 -
 2 files changed, 8 deletions(-)

diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index 39dbbdac75d08..7c02d35384ceb 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -174,18 +174,11 @@ trip_point_hyst_store(struct device *dev, struct device_attribute *attr,
 	trip = &tz->trips[trip_id];
 
 	if (hyst != trip->hysteresis) {
-		if (tz->ops.set_trip_hyst) {
-			ret = tz->ops.set_trip_hyst(tz, trip_id, hyst);
-			if (ret)
-				goto unlock;
-		}
-
 		trip->hysteresis = hyst;
 
 		thermal_zone_trip_updated(tz, trip);
 	}
 
-unlock:
 	mutex_unlock(&tz->lock);
 
 	return ret ? ret : count;
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 6eb6f3297ea00..eb4145a64c7e0 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -91,7 +91,6 @@ struct thermal_zone_device_ops {
 	int (*change_mode) (struct thermal_zone_device *,
 		enum thermal_device_mode);
 	int (*set_trip_temp) (struct thermal_zone_device *, int, int);
-	int (*set_trip_hyst) (struct thermal_zone_device *, int, int);
 	int (*get_crit_temp) (struct thermal_zone_device *, int *);
 	int (*set_emul_temp) (struct thermal_zone_device *, int);
 	int (*get_trend) (struct thermal_zone_device *,

From cca52f696952962f020c7e1393740d0ba07c3dc2 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 22 Feb 2024 19:06:05 +0100
Subject: [PATCH 11/17] thermal: intel: Set THERMAL_TRIP_FLAG_RW_TEMP directly

Some Intel thermal drivers need/want the temperature of their trip
points to be set by user space via sysfs and so they pass nonzero
writable trip masks during thermal zone registration for this purpose.

It is now possible to achieve the same result by setting the
THERMAL_TRIP_FLAG_RW_TEMP trip flag directly, so modify the drivers
in question to do that instead of using a nonzero writable trips mask.

No intentional functional impact.

Note that this change is requisite for dropping the mask argument from
thermal_zone_device_register_with_trips() going forward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 .../int340x_thermal/int340x_thermal_zone.c    |  8 +--
 .../processor_thermal_device_pci.c            |  3 +-
 .../thermal/intel/intel_quark_dts_thermal.c   | 20 ++-----
 drivers/thermal/intel/intel_soc_dts_iosf.c    | 57 ++++++++-----------
 drivers/thermal/intel/intel_soc_dts_iosf.h    |  1 -
 drivers/thermal/intel/x86_pkg_temp_thermal.c  |  4 +-
 6 files changed, 38 insertions(+), 55 deletions(-)

diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
index 1b0a9e9206c4d..0e8148afb490a 100644
--- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
+++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -129,7 +129,6 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 	struct thermal_trip *zone_trips;
 	unsigned long long trip_cnt = 0;
 	unsigned long long hyst;
-	int trip_mask = 0;
 	acpi_status status;
 	int i, ret;
 
@@ -140,10 +139,8 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 	int34x_zone->adev = adev;
 
 	status = acpi_evaluate_integer(adev->handle, "PATC", NULL, &trip_cnt);
-	if (ACPI_SUCCESS(status)) {
+	if (ACPI_SUCCESS(status))
 		int34x_zone->aux_trip_nr = trip_cnt;
-		trip_mask = BIT(trip_cnt) - 1;
-	}
 
 	zone_trips = kzalloc(sizeof(*zone_trips) * (trip_cnt + INT340X_THERMAL_MAX_TRIP_COUNT),
 			     GFP_KERNEL);
@@ -155,6 +152,7 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 	for (i = 0; i < trip_cnt; i++) {
 		zone_trips[i].type = THERMAL_TRIP_PASSIVE;
 		zone_trips[i].temperature = THERMAL_TEMP_INVALID;
+		zone_trips[i].flags |= THERMAL_TRIP_FLAG_RW_TEMP;
 	}
 
 	trip_cnt = int340x_thermal_read_trips(adev, zone_trips, trip_cnt);
@@ -173,7 +171,7 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 	int34x_zone->zone = thermal_zone_device_register_with_trips(
 							acpi_device_bid(adev),
 							zone_trips, trip_cnt,
-							trip_mask, int34x_zone,
+							0, int34x_zone,
 							&zone_ops,
 							&int340x_thermal_params,
 							0, 0);
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
index 8ff7e914ecf8e..7572f3a73c549 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -249,6 +249,7 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
 	struct proc_thermal_pci *pci_info;
 	struct thermal_trip psv_trip = {
 		.type = THERMAL_TRIP_PASSIVE,
+		.flags = THERMAL_TRIP_FLAG_RW_TEMP,
 	};
 	int irq_flag = 0, irq, ret;
 	bool msi_irq = false;
@@ -289,7 +290,7 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
 	psv_trip.temperature = get_trip_temp(pci_info);
 
 	pci_info->tzone = thermal_zone_device_register_with_trips("TCPU_PCI", &psv_trip,
-							1, 1, pci_info,
+							1, 0, pci_info,
 							&tzone_ops,
 							&tzone_params, 0, 0);
 	if (IS_ERR(pci_info->tzone)) {
diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c
index 210b822bc988e..55a031fc3a9af 100644
--- a/drivers/thermal/intel/intel_quark_dts_thermal.c
+++ b/drivers/thermal/intel/intel_quark_dts_thermal.c
@@ -93,10 +93,6 @@
 
 /* Quark DTS has 2 trip points: hot & catastrophic */
 #define QRK_MAX_DTS_TRIPS	2
-/* If DTS not locked, all trip points are configurable */
-#define QRK_DTS_WR_MASK_SET	0x3
-/* If DTS locked, all trip points are not configurable */
-#define QRK_DTS_WR_MASK_CLR	0
 
 #define DEFAULT_POLL_DELAY	2000
 
@@ -323,7 +319,6 @@ static struct soc_sensor_entry *alloc_soc_dts(void)
 	struct soc_sensor_entry *aux_entry;
 	int err;
 	u32 out;
-	int wr_mask;
 
 	aux_entry = kzalloc(sizeof(*aux_entry), GFP_KERNEL);
 	if (!aux_entry) {
@@ -337,13 +332,7 @@ static struct soc_sensor_entry *alloc_soc_dts(void)
 	if (err)
 		goto err_ret;
 
-	if (out & QRK_DTS_LOCK_BIT) {
-		aux_entry->locked = true;
-		wr_mask = QRK_DTS_WR_MASK_CLR;
-	} else {
-		aux_entry->locked = false;
-		wr_mask = QRK_DTS_WR_MASK_SET;
-	}
+	aux_entry->locked = !!(out & QRK_DTS_LOCK_BIT);
 
 	/* Store DTS default state if DTS registers are not locked */
 	if (!aux_entry->locked) {
@@ -360,6 +349,9 @@ static struct soc_sensor_entry *alloc_soc_dts(void)
 				    &aux_entry->store_ptps);
 		if (err)
 			goto err_ret;
+
+		trips[QRK_DTS_ID_TP_CRITICAL].flags |= THERMAL_TRIP_FLAG_RW_TEMP;
+		trips[QRK_DTS_ID_TP_HOT].flags |= THERMAL_TRIP_FLAG_RW_TEMP;
 	}
 
 	trips[QRK_DTS_ID_TP_CRITICAL].temperature = get_trip_temp(QRK_DTS_ID_TP_CRITICAL);
@@ -371,8 +363,8 @@ static struct soc_sensor_entry *alloc_soc_dts(void)
 	aux_entry->tzone = thermal_zone_device_register_with_trips("quark_dts",
 								   trips,
 								   QRK_MAX_DTS_TRIPS,
-								   wr_mask,
-								   aux_entry, &tzone_ops,
+								   0, aux_entry,
+								   &tzone_ops,
 								   NULL, 0, polling_delay);
 	if (IS_ERR(aux_entry->tzone)) {
 		err = PTR_ERR(aux_entry->tzone);
diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.c b/drivers/thermal/intel/intel_soc_dts_iosf.c
index c008eb42d82ed..5a84c91662745 100644
--- a/drivers/thermal/intel/intel_soc_dts_iosf.c
+++ b/drivers/thermal/intel/intel_soc_dts_iosf.c
@@ -202,16 +202,10 @@ static void remove_dts_thermal_zone(struct intel_soc_dts_sensor_entry *dts)
 }
 
 static int add_dts_thermal_zone(int id, struct intel_soc_dts_sensor_entry *dts,
-				struct thermal_trip *trips,
-				bool critical_trip)
+				struct thermal_trip *trips)
 {
-	int writable_trip_cnt = SOC_MAX_DTS_TRIPS;
 	char name[10];
-	unsigned long trip;
-	int trip_mask;
-	unsigned long ptps;
 	u32 store_ptps;
-	unsigned long i;
 	int ret;
 
 	/* Store status to restor on exit */
@@ -222,27 +216,21 @@ static int add_dts_thermal_zone(int id, struct intel_soc_dts_sensor_entry *dts,
 
 	dts->id = id;
 
-	if (critical_trip)
-		writable_trip_cnt--;
-
-	trip_mask = GENMASK(writable_trip_cnt - 1, 0);
-
 	/* Check if the writable trip we provide is not used by BIOS */
 	ret = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ,
 			    SOC_DTS_OFFSET_PTPS, &store_ptps);
-	if (ret)
-		trip_mask = 0;
-	else {
-		ptps = store_ptps;
-		for_each_set_clump8(i, trip, &ptps, writable_trip_cnt * 8)
-			trip_mask &= ~BIT(i / 8);
+	if (!ret) {
+		int i;
+
+		for (i = 0; i <= 1; i++) {
+			if (store_ptps & (0xFFU << i * 8))
+				trips[i].flags &= ~THERMAL_TRIP_FLAG_RW_TEMP;
+		}
 	}
-	dts->trip_mask = trip_mask;
 	snprintf(name, sizeof(name), "soc_dts%d", id);
 	dts->tzone = thermal_zone_device_register_with_trips(name, trips,
 							     SOC_MAX_DTS_TRIPS,
-							     trip_mask,
-							     dts, &tzone_ops,
+							     0, dts, &tzone_ops,
 							     NULL, 0, 0);
 	if (IS_ERR(dts->tzone)) {
 		ret = PTR_ERR(dts->tzone);
@@ -304,6 +292,14 @@ static void dts_trips_reset(struct intel_soc_dts_sensors *sensors, int dts_index
 	update_trip_temp(sensors, 1, 0);
 }
 
+static void set_trip(struct thermal_trip *trip, enum thermal_trip_type type,
+		     u8 flags, int temp)
+{
+	trip->type = type;
+	trip->flags = flags;
+	trip->temperature = temp;
+}
+
 struct intel_soc_dts_sensors *
 intel_soc_dts_iosf_init(enum intel_soc_dts_interrupt_type intr_type,
 			bool critical_trip, int crit_offset)
@@ -331,36 +327,33 @@ intel_soc_dts_iosf_init(enum intel_soc_dts_interrupt_type intr_type,
 	sensors->tj_max = tj_max * 1000;
 
 	for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
-		enum thermal_trip_type trip_type;
 		int temp;
 
 		sensors->soc_dts[i].sensors = sensors;
 
+		set_trip(&trips[i][0], THERMAL_TRIP_PASSIVE,
+			 THERMAL_TRIP_FLAG_RW_TEMP, 0);
+
 		ret = update_trip_temp(sensors, 0, 0);
 		if (ret)
 			goto err_reset_trips;
 
-		trips[i][0].type = THERMAL_TRIP_PASSIVE;
-		trips[i][0].temperature = 0;
-
 		if (critical_trip) {
-			trip_type = THERMAL_TRIP_CRITICAL;
 			temp = sensors->tj_max - crit_offset;
+			set_trip(&trips[i][1], THERMAL_TRIP_CRITICAL, 0, temp);
 		} else {
-			trip_type = THERMAL_TRIP_PASSIVE;
+			set_trip(&trips[i][1], THERMAL_TRIP_PASSIVE,
+				 THERMAL_TRIP_FLAG_RW_TEMP, 0);
 			temp = 0;
 		}
+
 		ret = update_trip_temp(sensors, 1, temp);
 		if (ret)
 			goto err_reset_trips;
-
-		trips[i][1].type = trip_type;
-		trips[i][1].temperature = temp;
 	}
 
 	for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
-		ret = add_dts_thermal_zone(i, &sensors->soc_dts[i], trips[i],
-					   critical_trip);
+		ret = add_dts_thermal_zone(i, &sensors->soc_dts[i], trips[i]);
 		if (ret)
 			goto err_remove_zone;
 	}
diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.h b/drivers/thermal/intel/intel_soc_dts_iosf.h
index da59d719eb9d3..44eee844ab3cb 100644
--- a/drivers/thermal/intel/intel_soc_dts_iosf.h
+++ b/drivers/thermal/intel/intel_soc_dts_iosf.h
@@ -28,7 +28,6 @@ struct intel_soc_dts_sensors;
 struct intel_soc_dts_sensor_entry {
 	int id;
 	u32 store_status;
-	u32 trip_mask;
 	struct thermal_zone_device *tzone;
 	struct intel_soc_dts_sensors *sensors;
 };
diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c
index 20cb21cb97c15..5a48b73a0951b 100644
--- a/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@ -295,6 +295,7 @@ static int pkg_temp_thermal_trips_init(int cpu, int tj_max,
 			tj_max - thres_reg_value * 1000 : THERMAL_TEMP_INVALID;
 
 		trips[i].type = THERMAL_TRIP_PASSIVE;
+		trips[i].flags |= THERMAL_TRIP_FLAG_RW_TEMP;
 
 		pr_debug("%s: cpu=%d, trip=%d, temp=%d\n",
 			 __func__, cpu, i, trips[i].temperature);
@@ -337,8 +338,7 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
 	INIT_DELAYED_WORK(&zonedev->work, pkg_temp_thermal_threshold_work_fn);
 	zonedev->cpu = cpu;
 	zonedev->tzone = thermal_zone_device_register_with_trips("x86_pkg_temp",
-			trips, thres_count,
-			(thres_count == MAX_NUMBER_OF_TRIPS) ? 0x03 : 0x01,
+			trips, thres_count, 0,
 			zonedev, &tzone_ops, &pkg_temp_tz_params, 0, 0);
 	if (IS_ERR(zonedev->tzone)) {
 		err = PTR_ERR(zonedev->tzone);

From c7ebf8e5d0681198347d515ff0702669b565d423 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 12 Feb 2024 19:35:56 +0100
Subject: [PATCH 12/17] mlxsw: core_thermal: Set THERMAL_TRIP_FLAG_RW_TEMP
 directly

It is now possible to flag trip points with THERMAL_TRIP_FLAG_RW_TEMP
to allow their temperature to be set from user space via sysfs instead
of using a nonzero writable trips mask during thermal zone registration,
so make the mlxsw code do that.

No intentional functional impact.

Note that this change is requisite for dropping the mask argument from
thermal_zone_device_register_with_trips() going forward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 .../net/ethernet/mellanox/mlxsw/core_thermal.c    | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
index f1b48d6615f6a..29ec0c1221394 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
@@ -44,16 +44,19 @@ static const struct thermal_trip default_thermal_trips[] = {
 		.type		= THERMAL_TRIP_ACTIVE,
 		.temperature	= MLXSW_THERMAL_ASIC_TEMP_NORM,
 		.hysteresis	= MLXSW_THERMAL_HYSTERESIS_TEMP,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 	{
 		/* In range - 40-100% PWM */
 		.type		= THERMAL_TRIP_ACTIVE,
 		.temperature	= MLXSW_THERMAL_ASIC_TEMP_HIGH,
 		.hysteresis	= MLXSW_THERMAL_HYSTERESIS_TEMP,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 	{	/* Warning */
 		.type		= THERMAL_TRIP_HOT,
 		.temperature	= MLXSW_THERMAL_ASIC_TEMP_HOT,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 };
 
@@ -62,16 +65,19 @@ static const struct thermal_trip default_thermal_module_trips[] = {
 		.type		= THERMAL_TRIP_ACTIVE,
 		.temperature	= MLXSW_THERMAL_MODULE_TEMP_NORM,
 		.hysteresis	= MLXSW_THERMAL_HYSTERESIS_TEMP,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 	{
 		/* In range - 40-100% PWM */
 		.type		= THERMAL_TRIP_ACTIVE,
 		.temperature	= MLXSW_THERMAL_MODULE_TEMP_HIGH,
 		.hysteresis	= MLXSW_THERMAL_HYSTERESIS_TEMP,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 	{	/* Warning */
 		.type		= THERMAL_TRIP_HOT,
 		.temperature	= MLXSW_THERMAL_MODULE_TEMP_HOT,
+		.flags		= THERMAL_TRIP_FLAG_RW_TEMP,
 	},
 };
 
@@ -92,9 +98,6 @@ static const struct mlxsw_cooling_states default_cooling_states[] = {
 
 #define MLXSW_THERMAL_NUM_TRIPS	ARRAY_SIZE(default_thermal_trips)
 
-/* Make sure all trips are writable */
-#define MLXSW_THERMAL_TRIP_MASK	(BIT(MLXSW_THERMAL_NUM_TRIPS) - 1)
-
 struct mlxsw_thermal;
 
 struct mlxsw_thermal_module {
@@ -420,7 +423,7 @@ mlxsw_thermal_module_tz_init(struct mlxsw_thermal_module *module_tz)
 	module_tz->tzdev = thermal_zone_device_register_with_trips(tz_name,
 							module_tz->trips,
 							MLXSW_THERMAL_NUM_TRIPS,
-							MLXSW_THERMAL_TRIP_MASK,
+							0,
 							module_tz,
 							&mlxsw_thermal_module_ops,
 							&mlxsw_thermal_params,
@@ -548,7 +551,7 @@ mlxsw_thermal_gearbox_tz_init(struct mlxsw_thermal_module *gearbox_tz)
 	gearbox_tz->tzdev = thermal_zone_device_register_with_trips(tz_name,
 						gearbox_tz->trips,
 						MLXSW_THERMAL_NUM_TRIPS,
-						MLXSW_THERMAL_TRIP_MASK,
+						0,
 						gearbox_tz,
 						&mlxsw_thermal_gearbox_ops,
 						&mlxsw_thermal_params, 0,
@@ -773,7 +776,7 @@ int mlxsw_thermal_init(struct mlxsw_core *core,
 	thermal->tzdev = thermal_zone_device_register_with_trips("mlxsw",
 						      thermal->trips,
 						      MLXSW_THERMAL_NUM_TRIPS,
-						      MLXSW_THERMAL_TRIP_MASK,
+						      0,
 						      thermal,
 						      &mlxsw_thermal_ops,
 						      &mlxsw_thermal_params, 0,

From 96c5330bf75839a31d6fdf953fade6e9fbf30bde Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 12 Feb 2024 19:38:07 +0100
Subject: [PATCH 13/17] wifi: iwlwifi: mvm: Set THERMAL_TRIP_FLAG_RW_TEMP
 directly

It is now possible to flag trip points with THERMAL_TRIP_FLAG_RW_TEMP
to allow their temperature to be set from user space via sysfs instead
of using a nonzero writable trips mask during thermal zone registration,
so make the iwlwifi code do that.

No intentional functional impact.

Note that this change is requisite for dropping the mask argument from
thermal_zone_device_register_with_trips() going forward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/tt.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
index d2a00cbcbc428..2353177f2dfab 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -667,9 +667,6 @@ static  struct thermal_zone_device_ops tzone_ops = {
 	.set_trip_temp = iwl_mvm_tzone_set_trip_temp,
 };
 
-/* make all trips writable */
-#define IWL_WRITABLE_TRIPS_MSK (BIT(IWL_MAX_DTS_TRIPS) - 1)
-
 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
 {
 	int i, ret;
@@ -692,11 +689,12 @@ static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
 	for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++) {
 		mvm->tz_device.trips[i].temperature = THERMAL_TEMP_INVALID;
 		mvm->tz_device.trips[i].type = THERMAL_TRIP_PASSIVE;
+		mvm->tz_device.trips[i].flags = THERMAL_TRIP_FLAG_RW_TEMP;
 	}
 	mvm->tz_device.tzone = thermal_zone_device_register_with_trips(name,
 							mvm->tz_device.trips,
 							IWL_MAX_DTS_TRIPS,
-							IWL_WRITABLE_TRIPS_MSK,
+							0,
 							mvm, &tzone_ops,
 							NULL, 0, 0);
 	if (IS_ERR(mvm->tz_device.tzone)) {

From 68e9c60353d263a5920b6378bcb9ba183241ce92 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 12 Feb 2024 19:39:20 +0100
Subject: [PATCH 14/17] thermal: imx: Set THERMAL_TRIP_FLAG_RW_TEMP directly

It is now possible to flag trip points with THERMAL_TRIP_FLAG_RW_TEMP
to allow their temperature to be set from user space via sysfs instead
of using a nonzero writable trips mask during thermal zone registration,
so make the imx thermal code do that.

No intentional functional impact.

Note that this change is requisite for dropping the mask argument from
thermal_zone_device_register_with_trips() going forward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/thermal/imx_thermal.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 499eff858f3f0..0dbede6bec546 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -115,7 +115,8 @@ struct thermal_soc_data {
 };
 
 static struct thermal_trip trips[] = {
-	[IMX_TRIP_PASSIVE]  = { .type = THERMAL_TRIP_PASSIVE  },
+	[IMX_TRIP_PASSIVE]  = { .type = THERMAL_TRIP_PASSIVE,
+				.flags = THERMAL_TRIP_FLAG_RW_TEMP },
 	[IMX_TRIP_CRITICAL] = { .type = THERMAL_TRIP_CRITICAL },
 };
 
@@ -700,7 +701,7 @@ static int imx_thermal_probe(struct platform_device *pdev)
 	data->tz = thermal_zone_device_register_with_trips("imx_thermal_zone",
 							   trips,
 							   ARRAY_SIZE(trips),
-							   BIT(IMX_TRIP_PASSIVE), data,
+							   0, data,
 							   &imx_tz_ops, NULL,
 							   IMX_PASSIVE_DELAY,
 							   IMX_POLLING_DELAY);

From 83c2d444ed9da7dd3536abb7596de309b8a9991f Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 22 Feb 2024 18:38:21 +0100
Subject: [PATCH 15/17] thermal: of: Set THERMAL_TRIP_FLAG_RW_TEMP directly

It is now possible to flag trip points with THERMAL_TRIP_FLAG_RW_TEMP
to allow their temperature to be set from user space via sysfs instead
of using a nonzero writable trips mask during thermal zone registration,
so make the OF thermal code do that.

No intentional functional impact.

Note that this change is requisite for dropping the mask argument from
thermal_zone_device_register_with_trips() going forward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/thermal/thermal_of.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 405743e905318..c3bd5fb15c7e2 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -117,6 +117,8 @@ static int thermal_of_populate_trip(struct device_node *np,
 		return ret;
 	}
 
+	trip->flags = THERMAL_TRIP_FLAG_RW_TEMP;
+
 	return 0;
 }
 
@@ -472,7 +474,7 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node *
 	struct device_node *np;
 	const char *action;
 	int delay, pdelay;
-	int ntrips, mask;
+	int ntrips;
 	int ret;
 
 	np = of_thermal_zone_find(sensor, id);
@@ -499,15 +501,13 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node *
 	of_ops.bind = thermal_of_bind;
 	of_ops.unbind = thermal_of_unbind;
 
-	mask = GENMASK_ULL((ntrips) - 1, 0);
-
 	ret = of_property_read_string(np, "critical-action", &action);
 	if (!ret)
 		if (!of_ops.critical && !strcasecmp(action, "reboot"))
 			of_ops.critical = thermal_zone_device_critical_reboot;
 
 	tz = thermal_zone_device_register_with_trips(np->name, trips, ntrips,
-						     mask, data, &of_ops, &tzp,
+						     0, data, &of_ops, &tzp,
 						     pdelay, delay);
 	if (IS_ERR(tz)) {
 		ret = PTR_ERR(tz);

From 4a62d588a84e13c68017bd16bc9c2531a2cde08f Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 22 Feb 2024 19:09:16 +0100
Subject: [PATCH 16/17] thermal: core: Eliminate writable trip points masks

All of the thermal_zone_device_register_with_trips() callers pass zero
writable trip points masks to it, so drop the mask argument from that
function and update all of its callers accordingly.

This also removes the artificial trip points per zone limit of 32,
related to using writable trip points masks.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/acpi/thermal.c                        |  2 +-
 .../ethernet/chelsio/cxgb4/cxgb4_thermal.c    |  2 +-
 .../ethernet/mellanox/mlxsw/core_thermal.c    |  3 --
 drivers/net/wireless/intel/iwlwifi/mvm/tt.c   |  1 -
 drivers/platform/x86/acerhdf.c                |  2 +-
 drivers/thermal/da9062-thermal.c              |  2 +-
 drivers/thermal/imx_thermal.c                 |  2 +-
 .../int340x_thermal/int340x_thermal_zone.c    |  2 +-
 .../processor_thermal_device_pci.c            |  2 +-
 drivers/thermal/intel/intel_pch_thermal.c     |  2 +-
 .../thermal/intel/intel_quark_dts_thermal.c   |  2 +-
 drivers/thermal/intel/intel_soc_dts_iosf.c    |  2 +-
 drivers/thermal/intel/x86_pkg_temp_thermal.c  |  2 +-
 drivers/thermal/rcar_thermal.c                |  2 +-
 drivers/thermal/st/st_thermal.c               |  2 +-
 drivers/thermal/thermal_core.c                | 28 ++-----------------
 drivers/thermal/thermal_of.c                  |  2 +-
 include/linux/thermal.h                       |  6 ++--
 18 files changed, 19 insertions(+), 47 deletions(-)

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 8042e96016e65..302dce0b2b504 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -665,7 +665,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz,
 	tz->thermal_zone = thermal_zone_device_register_with_trips("acpitz",
 								   trip_table,
 								   trip_count,
-								   0, tz,
+								   tz,
 								   &acpi_thermal_zone_ops,
 								   NULL,
 								   passive_delay,
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c
index dea9d29076667..b08356060fb46 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c
@@ -60,7 +60,7 @@ int cxgb4_thermal_init(struct adapter *adap)
 
 	snprintf(ch_tz_name, sizeof(ch_tz_name), "cxgb4_%s", adap->name);
 	ch_thermal->tzdev = thermal_zone_device_register_with_trips(ch_tz_name, &trip, num_trip,
-								    0, adap,
+								    adap,
 								    &cxgb4_thermal_ops,
 								    NULL, 0, 0);
 	if (IS_ERR(ch_thermal->tzdev)) {
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
index 29ec0c1221394..5c511e1a8efa2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
@@ -423,7 +423,6 @@ mlxsw_thermal_module_tz_init(struct mlxsw_thermal_module *module_tz)
 	module_tz->tzdev = thermal_zone_device_register_with_trips(tz_name,
 							module_tz->trips,
 							MLXSW_THERMAL_NUM_TRIPS,
-							0,
 							module_tz,
 							&mlxsw_thermal_module_ops,
 							&mlxsw_thermal_params,
@@ -551,7 +550,6 @@ mlxsw_thermal_gearbox_tz_init(struct mlxsw_thermal_module *gearbox_tz)
 	gearbox_tz->tzdev = thermal_zone_device_register_with_trips(tz_name,
 						gearbox_tz->trips,
 						MLXSW_THERMAL_NUM_TRIPS,
-						0,
 						gearbox_tz,
 						&mlxsw_thermal_gearbox_ops,
 						&mlxsw_thermal_params, 0,
@@ -776,7 +774,6 @@ int mlxsw_thermal_init(struct mlxsw_core *core,
 	thermal->tzdev = thermal_zone_device_register_with_trips("mlxsw",
 						      thermal->trips,
 						      MLXSW_THERMAL_NUM_TRIPS,
-						      0,
 						      thermal,
 						      &mlxsw_thermal_ops,
 						      &mlxsw_thermal_params, 0,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
index 2353177f2dfab..61a4638d1be2f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -694,7 +694,6 @@ static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
 	mvm->tz_device.tzone = thermal_zone_device_register_with_trips(name,
 							mvm->tz_device.trips,
 							IWL_MAX_DTS_TRIPS,
-							0,
 							mvm, &tzone_ops,
 							NULL, 0, 0);
 	if (IS_ERR(mvm->tz_device.tzone)) {
diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
index 74bcb3d131042..018c484296162 100644
--- a/drivers/platform/x86/acerhdf.c
+++ b/drivers/platform/x86/acerhdf.c
@@ -678,7 +678,7 @@ static int __init acerhdf_register_thermal(void)
 		return -EINVAL;
 
 	thz_dev = thermal_zone_device_register_with_trips("acerhdf", trips, ARRAY_SIZE(trips),
-							  0, NULL, &acerhdf_dev_ops,
+							  NULL, &acerhdf_dev_ops,
 							  &acerhdf_zone_params, 0,
 							  (kernelmode) ? interval*1000 : 0);
 	if (IS_ERR(thz_dev))
diff --git a/drivers/thermal/da9062-thermal.c b/drivers/thermal/da9062-thermal.c
index 160d64913057d..a27aff88cd96c 100644
--- a/drivers/thermal/da9062-thermal.c
+++ b/drivers/thermal/da9062-thermal.c
@@ -197,7 +197,7 @@ static int da9062_thermal_probe(struct platform_device *pdev)
 	mutex_init(&thermal->lock);
 
 	thermal->zone = thermal_zone_device_register_with_trips(thermal->config->name,
-								trips, ARRAY_SIZE(trips), 0, thermal,
+								trips, ARRAY_SIZE(trips), thermal,
 								&da9062_thermal_ops, NULL, pp_tmp,
 								0);
 	if (IS_ERR(thermal->zone)) {
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 0dbede6bec546..83eaae5ca3b8a 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -701,7 +701,7 @@ static int imx_thermal_probe(struct platform_device *pdev)
 	data->tz = thermal_zone_device_register_with_trips("imx_thermal_zone",
 							   trips,
 							   ARRAY_SIZE(trips),
-							   0, data,
+							   data,
 							   &imx_tz_ops, NULL,
 							   IMX_PASSIVE_DELAY,
 							   IMX_POLLING_DELAY);
diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
index 0e8148afb490a..e8182f0929d3d 100644
--- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
+++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -171,7 +171,7 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 	int34x_zone->zone = thermal_zone_device_register_with_trips(
 							acpi_device_bid(adev),
 							zone_trips, trip_cnt,
-							0, int34x_zone,
+							int34x_zone,
 							&zone_ops,
 							&int340x_thermal_params,
 							0, 0);
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
index 7572f3a73c549..7dcf6006816ea 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -290,7 +290,7 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
 	psv_trip.temperature = get_trip_temp(pci_info);
 
 	pci_info->tzone = thermal_zone_device_register_with_trips("TCPU_PCI", &psv_trip,
-							1, 0, pci_info,
+							1, pci_info,
 							&tzone_ops,
 							&tzone_params, 0, 0);
 	if (IS_ERR(pci_info->tzone)) {
diff --git a/drivers/thermal/intel/intel_pch_thermal.c b/drivers/thermal/intel/intel_pch_thermal.c
index 8bfb221e57e75..f5be2c389351a 100644
--- a/drivers/thermal/intel/intel_pch_thermal.c
+++ b/drivers/thermal/intel/intel_pch_thermal.c
@@ -237,7 +237,7 @@ static int intel_pch_thermal_probe(struct pci_dev *pdev,
 
 	ptd->tzd = thermal_zone_device_register_with_trips(board_names[board_id],
 							   ptd_trips, nr_trips,
-							   0, ptd, &tzd_ops,
+							   ptd, &tzd_ops,
 							   NULL, 0, 0);
 	if (IS_ERR(ptd->tzd)) {
 		dev_err(&pdev->dev, "Failed to register thermal zone %s\n",
diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c
index 55a031fc3a9af..ec6ad26027bcb 100644
--- a/drivers/thermal/intel/intel_quark_dts_thermal.c
+++ b/drivers/thermal/intel/intel_quark_dts_thermal.c
@@ -363,7 +363,7 @@ static struct soc_sensor_entry *alloc_soc_dts(void)
 	aux_entry->tzone = thermal_zone_device_register_with_trips("quark_dts",
 								   trips,
 								   QRK_MAX_DTS_TRIPS,
-								   0, aux_entry,
+								   aux_entry,
 								   &tzone_ops,
 								   NULL, 0, polling_delay);
 	if (IS_ERR(aux_entry->tzone)) {
diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.c b/drivers/thermal/intel/intel_soc_dts_iosf.c
index 5a84c91662745..2ab943b66f7aa 100644
--- a/drivers/thermal/intel/intel_soc_dts_iosf.c
+++ b/drivers/thermal/intel/intel_soc_dts_iosf.c
@@ -230,7 +230,7 @@ static int add_dts_thermal_zone(int id, struct intel_soc_dts_sensor_entry *dts,
 	snprintf(name, sizeof(name), "soc_dts%d", id);
 	dts->tzone = thermal_zone_device_register_with_trips(name, trips,
 							     SOC_MAX_DTS_TRIPS,
-							     0, dts, &tzone_ops,
+							     dts, &tzone_ops,
 							     NULL, 0, 0);
 	if (IS_ERR(dts->tzone)) {
 		ret = PTR_ERR(dts->tzone);
diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c
index 5a48b73a0951b..22a1e3268a989 100644
--- a/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@ -338,7 +338,7 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
 	INIT_DELAYED_WORK(&zonedev->work, pkg_temp_thermal_threshold_work_fn);
 	zonedev->cpu = cpu;
 	zonedev->tzone = thermal_zone_device_register_with_trips("x86_pkg_temp",
-			trips, thres_count, 0,
+			trips, thres_count,
 			zonedev, &tzone_ops, &pkg_temp_tz_params, 0, 0);
 	if (IS_ERR(zonedev->tzone)) {
 		err = PTR_ERR(zonedev->tzone);
diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index feb848d595fa1..925183753fcb4 100644
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -489,7 +489,7 @@ static int rcar_thermal_probe(struct platform_device *pdev)
 						&rcar_thermal_zone_ops);
 		} else {
 			priv->zone = thermal_zone_device_register_with_trips(
-				"rcar_thermal", trips, ARRAY_SIZE(trips), 0, priv,
+				"rcar_thermal", trips, ARRAY_SIZE(trips), priv,
 						&rcar_thermal_zone_ops, NULL, 0,
 						idle);
 
diff --git a/drivers/thermal/st/st_thermal.c b/drivers/thermal/st/st_thermal.c
index 0d6249b36609e..2a105409864ea 100644
--- a/drivers/thermal/st/st_thermal.c
+++ b/drivers/thermal/st/st_thermal.c
@@ -203,7 +203,7 @@ int st_thermal_register(struct platform_device *pdev,
 	trip.type = THERMAL_TRIP_CRITICAL;
 
 	sensor->thermal_dev =
-		thermal_zone_device_register_with_trips(dev_name(dev), &trip, 1, 0, sensor,
+		thermal_zone_device_register_with_trips(dev_name(dev), &trip, 1, sensor,
 							&st_tz_ops, NULL, 0, polling_delay);
 	if (IS_ERR(sensor->thermal_dev)) {
 		dev_err(dev, "failed to register thermal zone device\n");
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 2ab495220c6ef..f7a7d43809e72 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1248,7 +1248,6 @@ EXPORT_SYMBOL_GPL(thermal_zone_get_crit_temp);
  * @type:	the thermal zone device type
  * @trips:	a pointer to an array of thermal trips
  * @num_trips:	the number of trip points the thermal zone support
- * @mask:	a bit string indicating the writeablility of trip points
  * @devdata:	private device data
  * @ops:	standard thermal zone device callbacks
  * @tzp:	thermal zone platform parameters
@@ -1271,14 +1270,12 @@ EXPORT_SYMBOL_GPL(thermal_zone_get_crit_temp);
 struct thermal_zone_device *
 thermal_zone_device_register_with_trips(const char *type,
 					const struct thermal_trip *trips,
-					int num_trips, int mask,
-					void *devdata,
+					int num_trips, void *devdata,
 					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp,
 					int passive_delay, int polling_delay)
 {
 	struct thermal_zone_device *tz;
-	struct thermal_trip *trip;
 	int id;
 	int result;
 	struct thermal_governor *governor;
@@ -1294,20 +1291,7 @@ thermal_zone_device_register_with_trips(const char *type,
 		return ERR_PTR(-EINVAL);
 	}
 
-	/*
-	 * Max trip count can't exceed 31 as the "mask >> num_trips" condition.
-	 * For example, shifting by 32 will result in compiler warning:
-	 * warning: right shift count >= width of type [-Wshift-count- overflow]
-	 *
-	 * Also "mask >> num_trips" will always be true with 32 bit shift.
-	 * E.g. mask = 0x80000000 for trip id 31 to be RW. Then
-	 * mask >> 32 = 0x80000000
-	 * This will result in failure for the below condition.
-	 *
-	 * Check will be true when the bit 31 of the mask is set.
-	 * 32 bit shift will cause overflow of 4 byte integer.
-	 */
-	if (num_trips > (BITS_PER_TYPE(int) - 1) || num_trips < 0 || mask >> num_trips) {
+	if (num_trips < 0) {
 		pr_err("Incorrect number of thermal trips\n");
 		return ERR_PTR(-EINVAL);
 	}
@@ -1357,12 +1341,6 @@ thermal_zone_device_register_with_trips(const char *type,
 	tz->devdata = devdata;
 	tz->num_trips = num_trips;
 	memcpy(tz->trips, trips, num_trips * sizeof(*trips));
-	for_each_trip(tz, trip) {
-		if (mask & 1)
-			trip->flags |= THERMAL_TRIP_FLAG_RW_TEMP;
-
-		mask >>= 1;
-	}
 
 	thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay);
 	thermal_set_delay_jiffies(&tz->polling_delay_jiffies, polling_delay);
@@ -1447,7 +1425,7 @@ struct thermal_zone_device *thermal_tripless_zone_device_register(
 					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp)
 {
-	return thermal_zone_device_register_with_trips(type, NULL, 0, 0, devdata,
+	return thermal_zone_device_register_with_trips(type, NULL, 0, devdata,
 						       ops, tzp, 0, 0);
 }
 EXPORT_SYMBOL_GPL(thermal_tripless_zone_device_register);
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index c3bd5fb15c7e2..f1cbf9aa62cfe 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -507,7 +507,7 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node *
 			of_ops.critical = thermal_zone_device_critical_reboot;
 
 	tz = thermal_zone_device_register_with_trips(np->name, trips, ntrips,
-						     0, data, &of_ops, &tzp,
+						     data, &of_ops, &tzp,
 						     pdelay, delay);
 	if (IS_ERR(tz)) {
 		ret = PTR_ERR(tz);
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index eb4145a64c7e0..c33f50177f518 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -323,8 +323,7 @@ int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp);
 struct thermal_zone_device *thermal_zone_device_register_with_trips(
 					const char *type,
 					const struct thermal_trip *trips,
-					int num_trips, int mask,
-					void *devdata,
+					int num_trips, void *devdata,
 					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp,
 					int passive_delay, int polling_delay);
@@ -383,8 +382,7 @@ void thermal_zone_device_critical(struct thermal_zone_device *tz);
 static inline struct thermal_zone_device *thermal_zone_device_register_with_trips(
 					const char *type,
 					const struct thermal_trip *trips,
-					int num_trips, int mask,
-					void *devdata,
+					int num_trips, void *devdata,
 					const struct thermal_zone_device_ops *ops,
 					const struct thermal_zone_params *tzp,
 					int passive_delay, int polling_delay)

From 32abd250879a272fd96da48db59fde5ef71946cf Mon Sep 17 00:00:00 2001
From: Flavio Suligoi <f.suligoi@asem.it>
Date: Mon, 4 Mar 2024 12:00:22 +0100
Subject: [PATCH 17/17] thermal: core: Remove excess empty line from a comment

The first and the third lines of the kerneldoc comment for:

thermal_zone_device_set_polling()

belong to the same sentences, so join them together.

Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/thermal/thermal_core.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index f7a7d43809e72..34a31bc720230 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -273,7 +273,6 @@ static int __init thermal_register_governors(void)
 
 /*
  * Zone update section: main control loop applied to each zone while monitoring
- *
  * in polling mode. The monitoring is done using a workqueue.
  * Same update may be done on a zone by calling thermal_zone_device_update().
  *