This looks to have never gotten filled in, and it seems to
 trigger a bug in mesa.
Reviewed-by: NRoland Scheidegger <sroland@vmware.com>
Reported-by: NRoland Scheidegger <sroland@vmware.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>