[Intel-gfx] [PATCH] drm/i915: Clear gt.active_requests before checking idle status

[Matthew Auld]

On 03/31, Chris Wilson wrote:
> commit 8490ae207f1d ("drm/i915: Suppress busy status for engines if
> wedged") moved the check for inflight requests to the
> intel_engines_are_idle() check to protect the idle worker. However, the
> request selftests were also checking the engine idle status and erroring
> out if they did not become idle within a short period of time after the
> final wait. In order to accommodate the new check, call retire requests
> prior to the engine check so that we flush all the waits.
> 
> Fixes: 8490ae207f1d ("drm/i915: Suppress busy status for engines if wedged")
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Matthew Auld <matthew.william.auld at gmail.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Reviewed-by: Matthew Auld <matthew.william.auld at gmail.com>