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drm/amdgpu: WARN once if amdgpu_bo_unpin is called for an unpinned BO 

It indicates a pin/unpin imbalance bug somewhere. While the bug isn't
necessarily in the call chain hitting this, it's at least one part
involved.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michel Dänzer 2018-12-13 17:05:31 +01:00 committed by Alex Deucher
parent 344e7ad467
commit a3a0ebd10a
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
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@ -912,7 +912,7 @@ int amdgpu_bo_unpin(struct amdgpu_bo *bo)
struct ttm_operation_ctx ctx = { false, false };
int r, i;
if (!bo->pin_count) {
if (WARN_ON_ONCE(!bo->pin_count)) {
dev_warn(adev->dev, "%p unpin not necessary\n", bo);
return 0;
}