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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-07-09 23:44:30 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-07-22 16:25:46 +0200 |
| commit | 4676ba0be756b2b02b9737147713d458042962f7 (patch) | |
| tree | 98ad9d7ac294c6e59b90a5b0d40092a8a40b9264 /include/drm | |
| parent | 3a58ee106529ebea5710087e9b77bc11365665ae (diff) | |
| download | linux-4676ba0be756b2b02b9737147713d458042962f7.tar.bz2 | |
drm: Check locking in drm_for_each_fb
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.
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_crtc.h | 6 |
1 files changed, 5 insertions, 1 deletions
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__ */ |