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drm/i915: Simplify check for idleness in hangcheck

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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>
This commit is contained in:
Chris Wilson 2016-04-07 07:29:18 +01:00
parent 7c90b7de73
commit cffa781e59
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/i915/i915_irq.c
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@ -2805,9 +2805,8 @@ static void gen8_disable_vblank(struct drm_device *dev, unsigned int pipe)
static bool
ring_idle(struct intel_engine_cs *engine, u32 seqno)
{
return (list_empty(&engine->request_list) ||
i915_seqno_passed(seqno,
READ_ONCE(engine->last_submitted_seqno)));
return i915_seqno_passed(seqno,
READ_ONCE(engine->last_submitted_seqno));
}
static bool