[Intel-gfx] [PATCH v2 3/3] drm/i915: Check for a stuck waiter before a missed interrupt

[Chris Wilson]

On Thu, Jul 21, 2016 at 07:57:39AM +0100, Chris Wilson wrote:
> As the interrupt wakeup counter only increments when we have a waiter,
> before testing to see if that counter is unchanged we have to first
> check that we do expect it to change (i.e. we have a waiter).
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Fwiw, this series got a 10/10 pass rate for that bdw-u. It's not much,
but maybe an improvement?
https://bugs.freedesktop.org/show_bug.cgi?id=96974#c5
Tested-by: Humberto Israel Perez Rodriguez <humberto.i.perez.rodriguez at intel.com>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre