drm/i915: Always retire residual requests before suspend
If the driver is wedged, we skip idling the GPU. However, we may still have a few requests still not retired following the wedging (since they will be waiting for a background worker trying to acquire struct_mutex). As we hold the struct_mutex, always do a quick request retirement in order to flush the wedged path. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107257 Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180717084121.28185-1-chris@chris-wilson.co.uk
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