Ever since framebuffers are reference counted we have a special lock
for the global fb list. Make sure users of that list do hold that
lock when using the new iterators.
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
include/drm/drm_crtc.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 499562274353..10547be5684a 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1606,6 +1606,10 @@ assert_drm_connector_list_read_locked(struct
drm_mode_config *mode_config)
list_for_each_entry(encoder, &(dev)->mode_config.encoder_list, head)
#define drm_for_each_fb(fb, dev) \
- list_for_each_entry(fb, &(dev)->mode_config.fb_list, head)
+ for (WARN_ON(!mutex_is_locked(&(dev)->mode_config.fb_lock)),
\
+ fb = list_first_entry(&(dev)->mode_config.fb_list, \
+ struct drm_framebuffer, head);
\
+ &fb->head != (&(dev)->mode_config.fb_list);
\
+ fb = list_next_entry(fb, head))
#endif /* __DRM_CRTC_H__ */
--
2.1.4
