[PATCH AUTOSEL 5.12 057/134] drm/amd/display: Fix potential memory leak

From: Sasha Levin
Date: Mon May 03 2021 - 12:39:16 EST


From: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>

[ Upstream commit 51ba691206e35464fd7ec33dd519d141c80b5dff ]

[Why]
vblank_workqueue is never released.

[How]
Free it upon dm finish.

Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@xxxxxxx>
Acked-by: Solomon Chiu <solomon.chiu@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 9 +++++++++
1 file changed, 9 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 167e04ab9d5b..9c243f66867a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1191,6 +1191,15 @@ static void amdgpu_dm_fini(struct amdgpu_device *adev)
if (adev->dm.dc)
dc_deinit_callbacks(adev->dm.dc);
#endif
+
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+ if (adev->dm.vblank_workqueue) {
+ adev->dm.vblank_workqueue->dm = NULL;
+ kfree(adev->dm.vblank_workqueue);
+ adev->dm.vblank_workqueue = NULL;
+ }
+#endif
+
if (adev->dm.dc->ctx->dmub_srv) {
dc_dmub_srv_destroy(&adev->dm.dc->ctx->dmub_srv);
adev->dm.dc->ctx->dmub_srv = NULL;
--
2.30.2