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If we can't recover the GPU after the reset, mark it as wedged to cancel the outstanding tasks and to prevent new users from trying to use the broken GPU. v2: Check the same ring is hung again before declaring the reset broken. v3: use engine_stalled (Mika) Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484668747-9120-6-git-send-email-mika.kuoppala@intel.com