diff mbox series

[v6,4/5] media: uvcvideo: Annotate lock requirements for uvc_ctrl_set

Message ID 20241203-uvc-fix-async-v6-4-26c867231118@chromium.org
State New
Headers show
Series media: uvcvideo: Two +1 fixes for async controls | expand

Commit Message

Ricardo Ribalda Dec. 3, 2024, 9:20 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>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/media/usb/uvc/uvc_ctrl.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index def502195528..3dc9b7a49f64 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -1981,6 +1981,8 @@  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;