diff options
| -rw-r--r-- | include/drm/drm_crtc.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 10547be..fe31001 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1592,7 +1592,15 @@ static inline struct drm_property *drm_property_find(struct drm_device *dev, static inline void assert_drm_connector_list_read_locked(struct drm_mode_config *mode_config) { - WARN_ON(!mutex_is_locked(&mode_config->mutex)); + /* + * The connector hotadd/remove code currently grabs both locks when + * updating lists. Hence readers need only hold either of them to be + * safe and the check amounts to + * + * WARN_ON(not_holding(A) && not_holding(B)). + */ + WARN_ON(!mutex_is_locked(&mode_config->mutex) && + !drm_modeset_is_locked(&mode_config->connection_mutex)); } #define drm_for_each_connector(connector, dev) \ |