diff options
| author | wentalou <Wentao.Lou@amd.com> | 2019-04-16 15:09:16 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-04-19 11:32:56 -0500 |
| commit | 36e499b2490a470a9a1e8d40096b4e397efac056 (patch) | |
| tree | fef6911264842396f259da6cd03f8dce66c56437 /drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | |
| parent | 20299a8812dccdd24acfaa5f935fa8d81222bf9c (diff) | |
| download | linux-36e499b2490a470a9a1e8d40096b4e397efac056.tar.bz2 | |
drm/amdgpu: amdgpu_device_recover_vram got NULL of shadow->parent
amdgpu_bo_destroy had a bug by calling amdgpu_bo_unref outside mutex_lock.
If amdgpu_device_recover_vram executed between amdgpu_bo_unref and list_del_init,
it would get NULL of shadow->parent, then caused Call Trace and GPU reset failed.
Signed-off-by: Wentao Lou <Wentao.Lou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index ec9e45004bff..93b2c5a48a71 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -88,12 +88,14 @@ static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo) if (bo->gem_base.import_attach) drm_prime_gem_destroy(&bo->gem_base, bo->tbo.sg); drm_gem_object_release(&bo->gem_base); - amdgpu_bo_unref(&bo->parent); + /* in case amdgpu_device_recover_vram got NULL of bo->parent */ if (!list_empty(&bo->shadow_list)) { mutex_lock(&adev->shadow_list_lock); list_del_init(&bo->shadow_list); mutex_unlock(&adev->shadow_list_lock); } + amdgpu_bo_unref(&bo->parent); + kfree(bo->metadata); kfree(bo); } |