[PATCH v2 1/2] PM / Domains: Remove redundant pm_runtime_get|put*() in pm_genpd_prepare()

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

The PM core increases and decreases the runtime PM usage count in the
system PM prepare phase. This makes some of the pm_runtime_get|put*()
calls in pm_gendp_prepare() redundant, so let's remove them.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
---

Changes in v2:
	Updated changlog and added Kevin's reviewed by.

---
 drivers/base/power/domain.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 4ce4ce0..60a3573 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -730,14 +730,11 @@ static int pm_genpd_prepare(struct device *dev)
 	 * at this point and a system wakeup event should be reported if it's
 	 * set up to wake up the system from sleep states.
 	 */
-	pm_runtime_get_noresume(dev);
 	if (pm_runtime_barrier(dev) && device_may_wakeup(dev))
 		pm_wakeup_event(dev, 0);
 
-	if (pm_wakeup_pending()) {
-		pm_runtime_put(dev);
+	if (pm_wakeup_pending())
 		return -EBUSY;
-	}
 
 	if (resume_needed(dev, genpd))
 		pm_runtime_resume(dev);
@@ -751,10 +748,8 @@ static int pm_genpd_prepare(struct device *dev)
 
 	mutex_unlock(&genpd->lock);
 
-	if (genpd->suspend_power_off) {
-		pm_runtime_put_noidle(dev);
+	if (genpd->suspend_power_off)
 		return 0;
-	}
 
 	/*
 	 * The PM domain must be in the GPD_STATE_ACTIVE state at this point,
@@ -776,7 +771,6 @@ static int pm_genpd_prepare(struct device *dev)
 		pm_runtime_enable(dev);
 	}
 
-	pm_runtime_put(dev);
 	return ret;
 }
 
-- 
1.9.1