diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c
index 5e4b481595bd7be4ae334528c3f8c3a411874ad7..7ae62b6355b8d9ce5da5518f0be8f9c3bf217ab1 100644
--- a/drivers/base/power/common.c
+++ b/drivers/base/power/common.c
@@ -98,15 +98,15 @@ EXPORT_SYMBOL_GPL(dev_pm_put_subsys_data);
  * Callers must ensure proper synchronization of this function with power
  * management callbacks.
  *
- * Returns 0 on successfully attached PM domain and when it found that the
- * device don't need a PM domain, else a negative error code.
+ * Returns 0 on successfully attached PM domain, or when it is found that the
+ * device doesn't need a PM domain, else a negative error code.
  */
 int dev_pm_domain_attach(struct device *dev, bool power_on)
 {
 	int ret;
 
 	if (dev->pm_domain)
-		return -EEXIST;
+		return 0;
 
 	ret = acpi_dev_pm_attach(dev, power_on);
 	if (!ret)