--- 7f436ec075f6221df8ee6beafebae603054be003
+++ 544923988d138e1d55dfa25be708b85ae3fdf4be
@@ -192,6 +192,7 @@ int i965_reset(struct drm_device *dev, u
 		}
 	} else {
 		DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
+		mutex_unlock(&dev->struct_mutex);
 		return -ENODEV;
 	}