ACPI: make remove callback of ACPI driver void

For bus-based driver, device removal is implemented as: 1 device_remove()-> 2 bus->remove()-> 3 driver->remove() Driver core needs no inform from callee(bus driver) about the result of remove callback. In that case, commit fc7a620 ("bus: Make remove callback return void") forces bus_type::remove be void-returned. Now we have the situation that both 1 & 2 of calling chain are void-returned, so it does not make much sense for 3(driver->remove) to return non-void to its caller. So the basic idea behind this change is making remove() callback of any bus-based driver to be void-returned. This change, for itself, is for device drivers based on acpi-bus. Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Lee Jones <lee@kernel.org> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Dawei Li <set_pte_at@outlook.com> Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for drivers/platform/surface/* Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
mariux64 · Nov 23, 2022 · 6c0eb5b · 6c0eb5b
1 parent d7d4332
commit 6c0eb5b
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Showing 48 changed files with 88 additions and 149 deletions.
diff --git a/arch/ia64/hp/common/aml_nfw.c b/arch/ia64/hp/common/aml_nfw.c
@@ -187,9 +187,9 @@ static int aml_nfw_add(struct acpi_device *device)
 	return aml_nfw_add_global_handler();
 }
 
-static int aml_nfw_remove(struct acpi_device *device)
+static void aml_nfw_remove(struct acpi_device *device)
 {
-	return aml_nfw_remove_global_handler();
+	aml_nfw_remove_global_handler();
 }
 
 static const struct acpi_device_id aml_nfw_ids[] = {

diff --git a/arch/x86/platform/olpc/olpc-xo15-sci.c b/arch/x86/platform/olpc/olpc-xo15-sci.c
@@ -183,13 +183,12 @@ static int xo15_sci_add(struct acpi_device *device)
 	return r;
 }
 
-static int xo15_sci_remove(struct acpi_device *device)
+static void xo15_sci_remove(struct acpi_device *device)
 {
 	acpi_disable_gpe(NULL, xo15_sci_gpe);
 	acpi_remove_gpe_handler(NULL, xo15_sci_gpe, xo15_sci_gpe_handler);
 	cancel_work_sync(&sci_work);
 	sysfs_remove_file(&device->dev.kobj, &lid_wake_on_close_attr.attr);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
@@ -33,7 +33,7 @@ MODULE_DESCRIPTION("ACPI AC Adapter Driver");
 MODULE_LICENSE("GPL");
 
 static int acpi_ac_add(struct acpi_device *device);
-static int acpi_ac_remove(struct acpi_device *device);
+static void acpi_ac_remove(struct acpi_device *device);
 static void acpi_ac_notify(struct acpi_device *device, u32 event);
 
 static const struct acpi_device_id ac_device_ids[] = {
@@ -288,21 +288,19 @@ static int acpi_ac_resume(struct device *dev)
 #define acpi_ac_resume NULL
 #endif
 
-static int acpi_ac_remove(struct acpi_device *device)
+static void acpi_ac_remove(struct acpi_device *device)
 {
 	struct acpi_ac *ac = NULL;
 
 	if (!device || !acpi_driver_data(device))
-		return -EINVAL;
+		return;
 
 	ac = acpi_driver_data(device);
 
 	power_supply_unregister(ac->charger);
 	unregister_acpi_notifier(&ac->battery_nb);
 
 	kfree(ac);
-
-	return 0;
 }
 
 static int __init acpi_ac_init(void)

diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
@@ -449,7 +449,7 @@ static int acpi_pad_add(struct acpi_device *device)
 	return 0;
 }
 
-static int acpi_pad_remove(struct acpi_device *device)
+static void acpi_pad_remove(struct acpi_device *device)
 {
 	mutex_lock(&isolated_cpus_lock);
 	acpi_pad_idle_cpus(0);
@@ -458,7 +458,6 @@ static int acpi_pad_remove(struct acpi_device *device)
 	acpi_remove_notify_handler(device->handle,
 		ACPI_DEVICE_NOTIFY, acpi_pad_notify);
 	acpi_pad_remove_sysfs(device);
-	return 0;
 }
 
 static const struct acpi_device_id pad_device_ids[] = {

diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c
@@ -86,7 +86,7 @@ static DEFINE_MUTEX(register_count_mutex);
 static DEFINE_MUTEX(video_list_lock);
 static LIST_HEAD(video_bus_head);
 static int acpi_video_bus_add(struct acpi_device *device);
-static int acpi_video_bus_remove(struct acpi_device *device);
+static void acpi_video_bus_remove(struct acpi_device *device);
 static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
 static void acpi_video_bus_register_backlight_work(struct work_struct *ignored);
 static DECLARE_DELAYED_WORK(video_bus_register_backlight_work,
@@ -2067,13 +2067,13 @@ static int acpi_video_bus_add(struct acpi_device *device)
 	return error;
 }
 
-static int acpi_video_bus_remove(struct acpi_device *device)
+static void acpi_video_bus_remove(struct acpi_device *device)
 {
 	struct acpi_video_bus *video = NULL;
 
 
 	if (!device || !acpi_driver_data(device))
-		return -EINVAL;
+		return;
 
 	video = acpi_driver_data(device);
 
@@ -2087,8 +2087,6 @@ static int acpi_video_bus_remove(struct acpi_device *device)
 
 	kfree(video->attached_array);
 	kfree(video);
-
-	return 0;
 }
 
 static void acpi_video_bus_register_backlight_work(struct work_struct *ignored)

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
@@ -1208,20 +1208,19 @@ static int acpi_battery_add(struct acpi_device *device)
 	return result;
 }
 
-static int acpi_battery_remove(struct acpi_device *device)
+static void acpi_battery_remove(struct acpi_device *device)
 {
 	struct acpi_battery *battery = NULL;
 
 	if (!device || !acpi_driver_data(device))
-		return -EINVAL;
+		return;
 	device_init_wakeup(&device->dev, 0);
 	battery = acpi_driver_data(device);
 	unregister_pm_notifier(&battery->pm_nb);
 	sysfs_remove_battery(battery);
 	mutex_destroy(&battery->lock);
 	mutex_destroy(&battery->sysfs_lock);
 	kfree(battery);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
@@ -125,7 +125,7 @@ static const struct dmi_system_id dmi_lid_quirks[] = {
 };
 
 static int acpi_button_add(struct acpi_device *device);
-static int acpi_button_remove(struct acpi_device *device);
+static void acpi_button_remove(struct acpi_device *device);
 static void acpi_button_notify(struct acpi_device *device, u32 event);
 
 #ifdef CONFIG_PM_SLEEP
@@ -580,14 +580,13 @@ static int acpi_button_add(struct acpi_device *device)
 	return error;
 }
 
-static int acpi_button_remove(struct acpi_device *device)
+static void acpi_button_remove(struct acpi_device *device)
 {
 	struct acpi_button *button = acpi_driver_data(device);
 
 	acpi_button_remove_fs(device);
 	input_unregister_device(button->input);
 	kfree(button);
-	return 0;
 }
 
 static int param_set_lid_init_state(const char *val,

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
@@ -1663,12 +1663,12 @@ static int acpi_ec_add(struct acpi_device *device)
 	return ret;
 }
 
-static int acpi_ec_remove(struct acpi_device *device)
+static void acpi_ec_remove(struct acpi_device *device)
 {
 	struct acpi_ec *ec;
 
 	if (!device)
-		return -EINVAL;
+		return;
 
 	ec = acpi_driver_data(device);
 	release_region(ec->data_addr, 1);
@@ -1678,7 +1678,6 @@ static int acpi_ec_remove(struct acpi_device *device)
 		ec_remove_handlers(ec);
 		acpi_ec_free(ec);
 	}
-	return 0;
 }
 
 static acpi_status

diff --git a/drivers/acpi/hed.c b/drivers/acpi/hed.c
@@ -56,10 +56,9 @@ static int acpi_hed_add(struct acpi_device *device)
 	return 0;
 }
 
-static int acpi_hed_remove(struct acpi_device *device)
+static void acpi_hed_remove(struct acpi_device *device)
 {
 	hed_handle = NULL;
-	return 0;
 }
 
 static struct acpi_driver acpi_hed_driver = {

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
@@ -3371,10 +3371,9 @@ static int acpi_nfit_add(struct acpi_device *adev)
 	return devm_add_action_or_reset(dev, acpi_nfit_shutdown, acpi_desc);
 }
 
-static int acpi_nfit_remove(struct acpi_device *adev)
+static void acpi_nfit_remove(struct acpi_device *adev)
 {
 	/* see acpi_nfit_unregister */
-	return 0;
 }
 
 static void acpi_nfit_update_notify(struct device *dev, acpi_handle handle)

diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
@@ -96,7 +96,7 @@ struct acpi_sbs {
 
 #define to_acpi_sbs(x) power_supply_get_drvdata(x)
 
-static int acpi_sbs_remove(struct acpi_device *device);
+static void acpi_sbs_remove(struct acpi_device *device);
 static int acpi_battery_get_state(struct acpi_battery *battery);
 
 static inline int battery_scale(int log)
@@ -664,16 +664,16 @@ static int acpi_sbs_add(struct acpi_device *device)
 	return result;
 }
 
-static int acpi_sbs_remove(struct acpi_device *device)
+static void acpi_sbs_remove(struct acpi_device *device)
 {
 	struct acpi_sbs *sbs;
 	int id;
 
 	if (!device)
-		return -EINVAL;
+		return;
 	sbs = acpi_driver_data(device);
 	if (!sbs)
-		return -EINVAL;
+		return;
 	mutex_lock(&sbs->lock);
 	acpi_smbus_unregister_callback(sbs->hc);
 	for (id = 0; id < MAX_SBS_BAT; ++id)
@@ -682,7 +682,6 @@ static int acpi_sbs_remove(struct acpi_device *device)
 	mutex_unlock(&sbs->lock);
 	mutex_destroy(&sbs->lock);
 	kfree(sbs);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c
@@ -30,7 +30,7 @@ struct acpi_smb_hc {
 };
 
 static int acpi_smbus_hc_add(struct acpi_device *device);
-static int acpi_smbus_hc_remove(struct acpi_device *device);
+static void acpi_smbus_hc_remove(struct acpi_device *device);
 
 static const struct acpi_device_id sbs_device_ids[] = {
 	{"ACPI0001", 0},
@@ -280,19 +280,18 @@ static int acpi_smbus_hc_add(struct acpi_device *device)
 
 extern void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit);
 
-static int acpi_smbus_hc_remove(struct acpi_device *device)
+static void acpi_smbus_hc_remove(struct acpi_device *device)
 {
 	struct acpi_smb_hc *hc;
 
 	if (!device)
-		return -EINVAL;
+		return;
 
 	hc = acpi_driver_data(device);
 	acpi_ec_remove_query_handler(hc->ec, hc->query_bit);
 	acpi_os_wait_events_complete();
 	kfree(hc);
 	device->driver_data = NULL;
-	return 0;
 }
 
 module_acpi_driver(acpi_smb_hc_driver);

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
@@ -74,7 +74,7 @@ MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
 static struct workqueue_struct *acpi_thermal_pm_queue;
 
 static int acpi_thermal_add(struct acpi_device *device);
-static int acpi_thermal_remove(struct acpi_device *device);
+static void acpi_thermal_remove(struct acpi_device *device);
 static void acpi_thermal_notify(struct acpi_device *device, u32 event);
 
 static const struct acpi_device_id  thermal_device_ids[] = {
@@ -1059,19 +1059,18 @@ static int acpi_thermal_add(struct acpi_device *device)
 	return result;
 }
 
-static int acpi_thermal_remove(struct acpi_device *device)
+static void acpi_thermal_remove(struct acpi_device *device)
 {
 	struct acpi_thermal *tz;
 
 	if (!device || !acpi_driver_data(device))
-		return -EINVAL;
+		return;
 
 	flush_workqueue(acpi_thermal_pm_queue);
 	tz = acpi_driver_data(device);
 
 	acpi_thermal_unregister_thermal_zone(tz);
 	kfree(tz);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

diff --git a/drivers/acpi/tiny-power-button.c b/drivers/acpi/tiny-power-button.c
@@ -19,11 +19,15 @@ static const struct acpi_device_id tiny_power_button_device_ids[] = {
 };
 MODULE_DEVICE_TABLE(acpi, tiny_power_button_device_ids);
 
-static int acpi_noop_add_remove(struct acpi_device *device)
+static int acpi_noop_add(struct acpi_device *device)
 {
 	return 0;
 }
 
+static void acpi_noop_remove(struct acpi_device *device)
+{
+}
+
 static void acpi_tiny_power_button_notify(struct acpi_device *device, u32 event)
 {
 	kill_cad_pid(power_signal, 1);
@@ -34,8 +38,8 @@ static struct acpi_driver acpi_tiny_power_button_driver = {
 	.class = "tiny-power-button",
 	.ids = tiny_power_button_device_ids,
 	.ops = {
-		.add = acpi_noop_add_remove,
-		.remove = acpi_noop_add_remove,
+		.add = acpi_noop_add,
+		.remove = acpi_noop_remove,
 		.notify = acpi_tiny_power_button_notify,
 	},
 };

diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c
@@ -1123,10 +1123,9 @@ static int sonypi_acpi_add(struct acpi_device *device)
 	return 0;
 }
 
-static int sonypi_acpi_remove(struct acpi_device *device)
+static void sonypi_acpi_remove(struct acpi_device *device)
 {
 	sonypi_acpi_device = NULL;
-	return 0;
 }
 
 static const struct acpi_device_id sonypi_device_ids[] = {

diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
@@ -713,14 +713,12 @@ static int crb_acpi_add(struct acpi_device *device)
 	return tpm_chip_register(chip);
 }
 
-static int crb_acpi_remove(struct acpi_device *device)
+static void crb_acpi_remove(struct acpi_device *device)
 {
 	struct device *dev = &device->dev;
 	struct tpm_chip *chip = dev_get_drvdata(dev);
 
 	tpm_chip_unregister(chip);
-
-	return 0;
 }
 
 static const struct dev_pm_ops crb_pm = {

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
@@ -2239,7 +2239,7 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx)
 	return AE_OK;
 }
 
-static int vmbus_acpi_remove(struct acpi_device *device)
+static void vmbus_acpi_remove(struct acpi_device *device)
 {
 	struct resource *cur_res;
 	struct resource *next_res;
@@ -2256,8 +2256,6 @@ static int vmbus_acpi_remove(struct acpi_device *device)
 			kfree(cur_res);
 		}
 	}
-
-	return 0;
 }
 
 static void vmbus_reserve_fb(void)