On Tue Dec 3 21:20:12 2024 +0000, Ricardo Ribalda wrote:
> Asynchronous controls trigger an event when they have completed their
> operation.
>
> This can make that the control cached value does not match the value in
> the device.
>
> Let's flush the cache to be on the safe side.
>
> Signed-off-by: Ricardo Ribalda <riba...@chromium.org>
> Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> Link:
> https://lore.kernel.org/r/20241203-uvc-fix-async-v6-5-26c867231...@chromium.org
> Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
Patch committed.
Thanks,
Mauro Carvalho Chehab
drivers/media/usb/uvc/uvc_ctrl.c | 3 +++
1 file changed, 3 insertions(+)
---
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 21d5c62d1ac1..4e58476d305e 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -1622,6 +1622,9 @@ void uvc_ctrl_status_event(struct uvc_video_chain *chain,
mutex_lock(&chain->ctrl_mutex);
+ /* Flush the control cache, the data might have changed. */
+ ctrl->loaded = 0;
+
handle = ctrl->handle;
if (handle)
uvc_ctrl_set_handle(handle, ctrl, NULL);
