PM / Domains: Check for existing PM domain in dev_pm_domain_attach()

Instead of checking if an existing PM domain pointer has been assigned in
genpd_dev_pm_attach() and acpi_dev_pm_attach(), move the check to the
common path in dev_pm_domain_attach(), thus potentially avoid one
unnecessary check.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 3d96e4da2d98..d00630016176 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1259,9 +1259,6 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on)
         if (!adev)
                 return -ENODEV;
 
-        if (dev->pm_domain)
-                return -EEXIST;
-
         /*
          * Only attach the power domain to the first device if the
          * companion is shared by multiple. This is to prevent doing power