drm/i915/selftests: Replace wmb() with i915_gem_chipset_flush()

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Currently, we are being fairly lazy and only using a wmb() following an
update to an active batch. Previously, we have found that to be
insufficient to ensure that a write from the CPU reaches memory in a
timely fashion, and in some caches we may need to flush a chipset cache.
To that end, we have i915_gem_chipset_flush() so use it.

Suggested-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170926153409.7928-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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This commit is contained in:

Chris Wilson 2017-09-26 16:34:09 +01:00

parent e18063e88b

commit 60456d5c2d

2 changed files with 12 additions and 5 deletions

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10

drivers/gpu/drm/i915/selftests/i915_gem_request.c

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7

drivers/gpu/drm/i915/selftests/intel_hangcheck.c

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