drm/i915/selftests: Flush all active callbacks
Flushing the outer i915_active is not enough, as we need the barrier to be applied across all the active dma_fence callbacks. So we must serialise with each outstanding fence. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112096 References: f79520bb ("drm/i915/selftests: Synchronize checking active status with retirement") Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Acked-by: NAndi Shyti <andi.shyti@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191101181022.25633-1-chris@chris-wilson.co.uk
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