tree 68139686d74b1472a379a16810726f3f6f728220
parent aa3c2ba1c3a7c25d0440a8ac3ddd266c0f43b7b7
author Rob Clark <robdclark@gmail.com> 1506954517 -0400
committer Rob Clark <robdclark@gmail.com> 1507820351 -0400

drm/msm: use proper memory barriers for updating tail/head

Fixes intermittent corruption of cmdstream dump.

Signed-off-by: Rob Clark <robdclark@gmail.com>