Re: [PATCH v5 3/5] media: uvcvideo: Annotate lock requirements for uvc_ctrl_set

[Hans de Goede]

Hi,

On 2-Dec-24 3:24 PM, Ricardo Ribalda wrote:
> Make it explicit that the function is always called with ctrl_mutex
> being held.
> 
> Suggested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Regards,

Hans



> ---
>  drivers/media/usb/uvc/uvc_ctrl.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index af1e38f5c6e9..576e3854be91 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -1980,6 +1980,8 @@ 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;
>  
>