diff options
| author | Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com> | 2021-07-24 19:18:22 +0800 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2021-07-28 23:19:58 +0200 |
| commit | 28be2405fb753927e18bc1a891617a430b2a0684 (patch) | |
| tree | f89e80dbe10270475f16bc34b56742ede4e148a9 /drivers/gpu/drm/zte | |
| parent | c29758cdc78ab4ff2431e02015dd26aefa5097c9 (diff) | |
drm: use the lookup lock in drm_is_current_master
Inside drm_is_current_master, using the outer drm_device.master_mutex
to protect reads of drm_file.master makes the function prone to creating
lock hierarchy inversions. Instead, we can use the
drm_file.master_lookup_lock that sits at the bottom of the lock
hierarchy.
Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210724111824.59266-2-desmondcheongzx@gmail.com
Diffstat (limited to 'drivers/gpu/drm/zte')
0 files changed, 0 insertions, 0 deletions