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If we see an already signaled fence that we want to await on, we skip adding to the i915_sw_fence. However, we should pay attention to whether there was an error on that fence and if so propagate it for our future request. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191206160428.1503343-2-chris@chris-wilson.co.uk