[PATCH v6 3/4] media: uvcvideo: Avoid race condition during unregister

[Ricardo Ribalda]

The control events are handled asynchronously by the driver. Once the
control event are handled, the urb is re-submitted.

If we simply kill the urb, there is a chance that a control event is
waiting to be processed, which will re-submit the urb after the device is
disconnected.

uvc_status_suspend() flushes the async controls and stops the urb in a
correct manner.

Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
 drivers/media/usb/uvc/uvc_status.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c
index 375a95dd3011..8fd8250110e2 100644
--- a/drivers/media/usb/uvc/uvc_status.c
+++ b/drivers/media/usb/uvc/uvc_status.c
@@ -294,7 +294,7 @@ int uvc_status_init(struct uvc_device *dev)
 
 void uvc_status_unregister(struct uvc_device *dev)
 {
-	usb_kill_urb(dev->int_urb);
+	uvc_status_suspend(dev);
 	uvc_input_unregister(dev);
 }
 

-- 
2.45.2.627.g7a2c4fd464-goog