[Intel-gfx] [PATCH 1/4] drm/i915/gt: Ignore repeated attempts to suspend request flow across reset

[Chris Wilson]

Quoting Chris Wilson (2020-12-03 08:16:13)
> Before reseting the engine, we suspend the execution of the guilty
> request, so that we can continue execution with a new context while we
> slowly compress the captured error state for the guilty context. However,
> if the reset fails, we will promptly attempt to reset the same request
> again, and discover the ongoing capture. Ignore the second attempt to
> suspend and capture the same request.
> 
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/1168
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Fixes: 32ff621fd744 ("drm/i915/gt: Allow temporary suspension of inflight requests")
Cc: <stable at vger.kernel.org> # v5.7+