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drm/amdgpu: set metadata pointer to NULL after freeing. 

Without this there was a double free of the metadata,
which ended up freeing the fd table for me here, and taking
out the machine more often than not.

I reproduced with X.org + modesetting DDX + latest llvm/mesa,
also required using dri3.

Cc: stable@vger.kernel.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dave Airlie 2016-05-03 12:44:29 +10:00 committed by Alex Deucher
parent ea99697814
commit 0092d3edcb
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
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@ -541,6 +541,7 @@ int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
if (!metadata_size) {
if (bo->metadata_size) {
kfree(bo->metadata);
bo->metadata = NULL;
bo->metadata_size = 0;
}
return 0;