Merge remote-tracking branch 'mkp-scsi/4.5/scsi-fixes' into fixes

[cascardo/linux.git] / drivers / base / power / common.c

diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c
index f48e333..93ed14c 100644 (file)
--- a/drivers/base/power/common.c
+++ b/drivers/base/power/common.c
@@ -14,6 +14,8 @@
 #include <linux/acpi.h>
 #include <linux/pm_domain.h>
 
+#include "power.h"
+
 /**
  * dev_pm_get_subsys_data - Create or refcount power.subsys_data for device.
  * @dev: Device to handle.
@@ -128,3 +130,25 @@ void dev_pm_domain_detach(struct device *dev, bool power_off)
                dev->pm_domain->detach(dev, power_off);
 }
 EXPORT_SYMBOL_GPL(dev_pm_domain_detach);
+
+/**
+ * dev_pm_domain_set - Set PM domain of a device.
+ * @dev: Device whose PM domain is to be set.
+ * @pd: PM domain to be set, or NULL.
+ *
+ * Sets the PM domain the device belongs to. The PM domain of a device needs
+ * to be set before its probe finishes (it's bound to a driver).
+ *
+ * This function must be called with the device lock held.
+ */
+void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd)
+{
+       if (dev->pm_domain == pd)
+               return;
+
+       WARN(device_is_bound(dev),
+            "PM domains can only be changed for unbound devices\n");
+       dev->pm_domain = pd;
+       device_pm_check_callbacks(dev);
+}
+EXPORT_SYMBOL_GPL(dev_pm_domain_set);