[Intel-gfx] [PATCH] drm/i915: Fix the port submission race during engine reset in execlists mode

[Chris Wilson]

Quoting Chuanxiao Dong (2017-07-19 09:14:14)
> During the engine reset, there is a race condition which can make the
> request submitted to HW twice. This is due to the irq tasklet function
> enabled too earliy which is just before init_hw callback. This patch
> will move the irq tasklet enabling after init_hw to resolve this race.

This is not the only bug here. Please have a look at the series
https://patchwork.freedesktop.org/series/27385/
-Chris