[PATCH v5 5/5] media: uvcvideo: Flush the control cache when we get an event

[Ricardo Ribalda]

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 <ribalda@xxxxxxxxxxxx>
---
 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 e90bf2aeb5e4..75d534072f50 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -1672,6 +1672,9 @@ bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
 	struct uvc_device *dev = chain->dev;
 	struct uvc_ctrl_work *w = &dev->async_ctrl;
 
+	/* Flush the control cache, the data might have changed. */
+	ctrl->loaded = 0;
+
 	if (list_empty(&ctrl->info.mappings))
 		return false;
 

-- 
2.47.0.338.g60cca15819-goog