drm/i915: check that we hold an RPM wakelock ref before we put it

With this change we have the corresponding wake lock checks in both the
rpm get and put functions.

v2-v3:
- unchanged
v4:
- keep the corresponding check in the get helper (Chris)
v5:
- add a note to the commit message that with this change we have the
  checks both in the rpm get and put functions (Joonas)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450203038-5150-9-git-send-email-imre.deak@intel.com

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index df9a3f14d759c40c5e4bc9ca523b0b067c75e15f..4c80d2adac7050b95224d8975dfdc0c8f878860c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -2286,6 +2286,7 @@ void intel_runtime_pm_put(struct drm_i915_private *dev_priv)
        struct drm_device *dev = dev_priv->dev;
        struct device *device = &dev->pdev->dev;
 
+       assert_rpm_wakelock_held(dev_priv);
        atomic_dec(&dev_priv->pm.wakeref_count);
 
        pm_runtime_mark_last_busy(device);