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Chris Wilson authored
Never go to sleep waiting on the GPU without first ensuring that we will get woken up. We have a choice of queuing the hangcheck before every schedule() or the first time we wakeup. In order to simply accommodate both the signaler and the ordinary waiter, move the queuing to the common point of enabling the irq. We lose the paranoid safety of ensuring that the hangcheck is active before the sleep, but avoid code duplication (and redundant hangcheck queuing). Testcase: igt/prime_busy Fixes: c81d4613 ("drm/i915: Convert trace-irq to the breadcrumb waiter") Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1468055535-19740-2-git-send-email-chris@chris-wilson.co.ukReviewed-by:
Mika Kuoppala <mika.kuoppala@intel.com>
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