Re: [Intel-gfx] [PATCH] drm/i915/gt: Avoid resetting ring->head outside of its timeline mutex

Quoting Chris Wilson (2020-02-10 16:42:15) > We manipulate ring->head while active in i915_request_retire underneath > the timeline manipulation. We cannot rely on a stable ring->head outside > of the timeline->mutex, in particular while setting up the context for > resume and reset. > > Closes: h

[Intel-gfx] [PATCH] drm/i915/gt: Avoid resetting ring->head outside of its timeline mutex

We manipulate ring->head while active in i915_request_retire underneath the timeline manipulation. We cannot rely on a stable ring->head outside of the timeline->mutex, in particular while setting up the context for resume and reset. Closes: https://gitlab.freedesktop.org/drm/intel/issues/1126 Ref