diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index dfac394d0602..7d02e32b4e94 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -5273,12 +5273,14 @@ void drm_mode_config_reset(struct drm_device *dev)
 		if (encoder->funcs->reset)
 			encoder->funcs->reset(encoder);
 
+	mutex_lock(&dev->mode_config.mutex);
 	drm_for_each_connector(connector, dev) {
 		connector->status = connector_status_unknown;
 
 		if (connector->funcs->reset)
 			connector->funcs->reset(connector);
 	}
+	mutex_unlock(&dev->mode_config.mutex);
 }
 EXPORT_SYMBOL(drm_mode_config_reset);