drm/i915: Simplify check for idleness in hangcheck
Having fixed the tracking of the engine's last_submitted_seqno, we can now rely on it for detecting when the engine is idle (and not have to touch the requests pointer). Testcase: igt/gem_exec_whisper Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1460010558-10705-9-git-send-email-chris@chris-wilson.co.uk Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
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@ -2805,9 +2805,8 @@ static void gen8_disable_vblank(struct drm_device *dev, unsigned int pipe)
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static bool
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ring_idle(struct intel_engine_cs *engine, u32 seqno)
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{
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return (list_empty(&engine->request_list) ||
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i915_seqno_passed(seqno,
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READ_ONCE(engine->last_submitted_seqno)));
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return i915_seqno_passed(seqno,
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READ_ONCE(engine->last_submitted_seqno));
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}
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static bool
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