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-rw-r--r--drivers/base/power/common.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c
index f6a9ad52cbbf..7ae62b6355b8 100644
--- a/drivers/base/power/common.c
+++ b/drivers/base/power/common.c
@@ -98,17 +98,21 @@ 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 or 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 0;
+
ret = acpi_dev_pm_attach(dev, power_on);
- if (ret)
+ if (!ret)
ret = genpd_dev_pm_attach(dev);
- return ret;
+ return ret < 0 ? ret : 0;
}
EXPORT_SYMBOL_GPL(dev_pm_domain_attach);