[Intel-gfx] [PATCH] drm/i915/execlists: Poison the CSB after use

[Chris Wilson]

Quoting Chris Wilson (2018-11-21 13:08:23)
> After reading the event status from the CSB, write back 0 (an invalid
> value) so we can detect if the HW should signal a new event without
> writing the event in the future.
> 
> References: https://bugs.freedesktop.org/show_bug.cgi?id=108315
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>

Wrong branch, ignore this.
-Chris