drm/radeon: take the mode_config mutex when dealing with hpds (v2)

Since we are messing with state in the worker.

v2: drop the changes in the mst worker

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2015-05-15 11:48:52 -04:00
commit 39fa10f7e2