[PATCH 3/3] PM / Domains: Take WAKEUP_POWERED driver flag into account

[Ulf Hansson <ulf.hansson@linaro.org>]

Make genpd to take the WAKEUP_POWERED driver flag into account during
system suspend/resume. More precisely, in case the WAKEUP_POWERED flag is
set, let's leave the device in full power state and prevent the PM domain
from being powered off.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/base/power/domain.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 24e39ce..dc18f88 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1037,8 +1037,11 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
 	if (IS_ERR(genpd))
 		return -EINVAL;
 
-	if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
-		return 0;
+	if (dev->power.wakeup_path) {
+		if (dev_pm_test_driver_flags(dev, DPM_FLAG_WAKEUP_POWERED) ||
+		    genpd_is_active_wakeup(genpd))
+			return 0;
+	}
 
 	if (poweroff)
 		ret = pm_generic_poweroff_noirq(dev);
@@ -1092,8 +1095,11 @@ static int genpd_resume_noirq(struct device *dev)
 	if (IS_ERR(genpd))
 		return -EINVAL;
 
-	if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
-		return 0;
+	if (dev->power.wakeup_path) {
+		if (dev_pm_test_driver_flags(dev, DPM_FLAG_WAKEUP_POWERED) ||
+		    genpd_is_active_wakeup(genpd))
+			return 0;
+	}
 
 	genpd_lock(genpd);
 	genpd_sync_power_on(genpd, true, 0);
-- 
2.7.4