drm/i915: Propagate error from i915_gem_object_flush_gpu_write_domain()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bf486b1..81179fb 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4905,7 +4905,9 @@
 	drm_gem_object_reference(obj);
 
 	crtc->fb = fb;
-	i915_gem_object_flush_write_domain(obj);
+	ret = i915_gem_object_flush_write_domain(obj);
+	if (ret)
+		goto cleanup_objs;
 
 	ret = drm_vblank_get(dev, intel_crtc->pipe);
 	if (ret)