revert this:
commit 06e562e7f515292ea7721475950f23554214adde Author: Chris Wilson <email address hidden> Date: Mon Nov 5 09:43:05 2018 +0000
drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5
commit fb5bbae9b1333d44023713946fdd28db0cd85751 upstream.
revert this:
commit 06e562e7f515292 ea7721475950f23 554214adde
Author: Chris Wilson <email address hidden>
Date: Mon Nov 5 09:43:05 2018 +0000
drm/ i915/ringbuffer : Delay after EMIT_INVALIDATE for gen4/gen5
commit fb5bbae9b1333d4 4023713946fdd28 db0cd85751 upstream.