[Intel-gfx] [PATCH 1/2] drm/i915: fix possible RPM ref leaking during RPS disabling

[Imre Deak]

In

commit c6df39b5ea6342323a42edfbeeca0a28c643d7ae
Author: Imre Deak <imre.deak at intel.com>
Date:   Mon Apr 14 20:24:29 2014 +0300

    drm/i915: get a runtime PM ref for the deferred GT powersave enabling

I added an RPM get-ref when enabling RPS from a deferred work, but forgot
to add the corresponding put-ref when canceling the work. This may leave
RPM disabled.

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 834c49c..9170039 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4609,7 +4609,9 @@ void intel_disable_gt_powersave(struct drm_device *dev)
 		ironlake_disable_drps(dev);
 		ironlake_disable_rc6(dev);
 	} else if (IS_GEN6(dev) || IS_GEN7(dev)) {
-		cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
+		if (cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work))
+			intel_runtime_pm_put(dev_priv);
+
 		cancel_work_sync(&dev_priv->rps.work);
 		mutex_lock(&dev_priv->rps.hw_lock);
 		if (IS_VALLEYVIEW(dev))
-- 
1.8.4