From: Qingqing Zhuo <[email protected]>

[ Upstream commit 51ba691206e35464fd7ec33dd519d141c80b5dff ]

[Why]
vblank_workqueue is never released.

[How]
Free it upon dm finish.

Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Qingqing Zhuo <[email protected]>
Reviewed-by: Nicholas Kazlauskas <[email protected]>
Acked-by: Solomon Chiu <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
 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

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