diff mbox series

[v4,3/4] media: uvcvideo: Annotate lock requirements for uvc_ctrl_set

Message ID 20241129-uvc-fix-async-v4-3-f23784dba80f@chromium.org (mailing list archive)
State New
Headers show
Series media: uvcvideo: Two fixes for async controls | expand

Commit Message

Ricardo Ribalda Nov. 29, 2024, 9:30 p.m. UTC 
Make it explicit that the function is always called with ctrl_mutex
being held.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/media/usb/uvc/uvc_ctrl.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index bc96fb475b9c..e02540162dd4 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -1968,6 +1968,8 @@  int uvc_ctrl_set(struct uvc_fh *handle,
 	s32 max;
 	int ret;
 
+	lockdep_assert_held(&chain->ctrl_mutex);
+
 	if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0)
 		return -EACCES;