Because of DP MST encoders/connectors can now be hotplugged and we must hold the right lock when walking the encoder/connector lists. Enforce this by checking the locking in our shiny new list walking macros.
Signed-off-by: Daniel Vetter daniel.vetter@intel.com --- include/drm/drm_crtc.h | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 5994750f523a..a912ba06cf45 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1588,10 +1588,18 @@ static inline struct drm_property *drm_property_find(struct drm_device *dev, list_for_each_entry(crtc, &(dev)->mode_config.crtc_list, head)
#define drm_for_each_connector(connector, dev) \ - list_for_each_entry(connector, &(dev)->mode_config.connector_list, head) + for (WARN_ON(!mutex_is_locked(&(dev)->mode_config.mutex)), \ + connector = list_first_entry(&(dev)->mode_config.connector_list, \ + struct drm_connector, head); \ + &connector->head != (&(dev)->mode_config.connector_list); \ + connector = list_next_entry(connector, head))
#define drm_for_each_encoder(encoder, dev) \ - list_for_each_entry(encoder, &(dev)->mode_config.encoder_list, head) + for (WARN_ON(!mutex_is_locked(&(dev)->mode_config.mutex)), \ + encoder = list_first_entry(&(dev)->mode_config.encoder_list, \ + struct drm_encoder, head); \ + &encoder->head != (&(dev)->mode_config.encoder_list); \ + encoder = list_next_entry(encoder, head))
#define drm_for_each_fb(fb, dev) \ list_for_each_entry(fb, &(dev)->mode_config.fb_list, head)