---

yaml
---
r: 377274
b: refs/heads/master
c: b9e95fc
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6ee22e9d59151550a55d370b14109bdae8b58bda
+refs/heads/master: b9e95fc65ededbec083aa91b4faa58ad992c0891

trunk/drivers/acpi/acpi_lpss.c

@@ -164,15 +164,24 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
 	if (dev_desc->clk_required) {
 		ret = register_device_clock(adev, pdata);
 		if (ret) {
-			/*
-			 * Skip the device, but don't terminate the namespace
-			 * scan.
-			 */
-			kfree(pdata);
-			return 0;
+			/* Skip the device, but continue the namespace scan. */
+			ret = 0;
+			goto err_out;
 		}
 	}
 
+	/*
+	 * This works around a known issue in ACPI tables where LPSS devices
+	 * have _PS0 and _PS3 without _PSC (and no power resources), so
+	 * acpi_bus_init_power() will assume that the BIOS has put them into D0.
+	 */
+	ret = acpi_device_fix_up_power(adev);
+	if (ret) {
+		/* Skip the device, but continue the namespace scan. */
+		ret = 0;
+		goto err_out;
+	}
+
 	adev->driver_data = pdata;
 	ret = acpi_create_platform_device(adev, id);
 	if (ret > 0)

trunk/drivers/acpi/device_pm.c

@@ -290,6 +290,26 @@ int acpi_bus_init_power(struct acpi_device *device)
 	return 0;
 }
 
+/**
+ * acpi_device_fix_up_power - Force device with missing _PSC into D0.
+ * @device: Device object whose power state is to be fixed up.
+ *
+ * Devices without power resources and _PSC, but having _PS0 and _PS3 defined,
+ * are assumed to be put into D0 by the BIOS.  However, in some cases that may
+ * not be the case and this function should be used then.
+ */
+int acpi_device_fix_up_power(struct acpi_device *device)
+{
+	int ret = 0;
+
+	if (!device->power.flags.power_resources
+	    && !device->power.flags.explicit_get
+	    && device->power.state == ACPI_STATE_D0)
+		ret = acpi_dev_pm_explicit_set(device, ACPI_STATE_D0);
+
+	return ret;
+}
+
 int acpi_bus_update_power(acpi_handle handle, int *state_p)
 {
 	struct acpi_device *device;

trunk/include/acpi/acpi_bus.h

@@ -382,6 +382,7 @@ const char *acpi_power_state_string(int state);
 int acpi_device_get_power(struct acpi_device *device, int *state);
 int acpi_device_set_power(struct acpi_device *device, int state);
 int acpi_bus_init_power(struct acpi_device *device);
+int acpi_device_fix_up_power(struct acpi_device *device);
 int acpi_bus_update_power(acpi_handle handle, int *state_p);
 bool acpi_bus_power_manageable(acpi_handle handle);