[ Sasha's backport helper bot ]
Hi,
The upstream commit SHA1 provided is correct: 2a3cfb9a24a28da9cc13d2c525a76548865e182c
WARNING: Author mismatch between patch and upstream commit:
Backport author: <jianqi.ren.cn@xxxxxxxxxxxxx>
Commit author: Nikita Zhandarovich <n.zhandarovich@xxxxxxxxxx>
Status in newer kernel trees:
6.12.y | Present (exact SHA1)
6.6.y | Present (different SHA1: e040f1fbe9ab)
6.1.y | Not found
Note: The patch differs from the upstream commit:
---
1: 2a3cfb9a24a28 ! 1: d2c2f56b0642e drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()
@@ Metadata
## Commit message ##
drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()
+ [ Upstream commit 2a3cfb9a24a28da9cc13d2c525a76548865e182c ]
+
Since 'adev->dm.dc' in amdgpu_dm_fini() might turn out to be NULL
before the call to dc_enable_dmub_notifications(), check
beforehand to ensure there will not be a possible NULL-ptr-deref
@@ Commit message
Fixes: 81927e2808be ("drm/amd/display: Support for DMUB AUX")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@xxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
+ Signed-off-by: Jianqi Ren <jianqi.ren.cn@xxxxxxxxxxxxx>
## drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c ##
@@ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c: static void amdgpu_dm_fini(struct amdgpu_device *adev)
- adev->dm.hdcp_workqueue = NULL;
- }
+ dc_deinit_callbacks(adev->dm.dc);
+ #endif
- if (adev->dm.dc)
+ if (adev->dm.dc) {
- dc_deinit_callbacks(adev->dm.dc);
--
-- if (adev->dm.dc)
dc_dmub_srv_destroy(&adev->dm.dc->ctx->dmub_srv);
-
- if (dc_enable_dmub_notifications(adev->dm.dc)) {
---
Results of testing on various branches:
| Branch | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.1.y | Success | Success |
