[PATCH 69/81] drm/amd/display: Release cached atomic state in S3.

[sunpeng.li at amd.com]

From: Andrey Grodzovsky <Andrey.Grodzovsky at amd.com>

Fixes memory leak.

Change-Id: I32f68c72d11695f49bb8328a11e89922818fb9fe
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index b6a04ad..8377575 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -508,6 +508,7 @@ static int dm_suspend(void *handle)
 
 	amdgpu_dm_irq_suspend(adev);
 
+	WARN_ON(adev->dm.cached_state);
 	adev->dm.cached_state = drm_atomic_helper_suspend(adev->ddev);
 
 	dc_set_power_state(
@@ -607,6 +608,9 @@ int amdgpu_dm_display_resume(struct amdgpu_device *adev )
 
 	ret = drm_atomic_helper_resume(ddev, adev->dm.cached_state);
 
+	drm_atomic_state_put(adev->dm.cached_state);
+	adev->dm.cached_state = NULL;
+
 	amdgpu_dm_irq_resume_late(adev);
 
 	return ret;
-- 
2.7.4