Down the call stack from the ioctl handler for VIDIOC_STREAMON,
uvc_video_alloc_requests contains a BUG_ON, which in the high level,
triggers when VIDIOC_STREAMON ioctl is issued without VIDIOC_STREAMOFF
being issued previously.
This can also be triggered by starting the stream and then physically
disconnecting usb. To fix this, do the streamoff procedures on usb
disconnect.
Signed-off-by: Paul Elder <paul.elder@xxxxxxxx>
---
drivers/usb/gadget/function/f_uvc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index 3324d36e809c..e67f42ee2342 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -384,9 +384,12 @@ uvc_function_disable(struct usb_function *f)
{
struct uvc_device *uvc = to_uvc(f);
struct v4l2_event v4l2_event;
+ struct uvc_video *video = &uvc->video;
INFO(f->config->cdev, "uvc_function_disable\n");
+ uvcg_video_enable(video, 0);
+
memset(&v4l2_event, 0, sizeof(v4l2_event));
v4l2_event.type = UVC_EVENT_DISCONNECT;
v4l2_event_queue(&uvc->vdev, &v4l2_event);
--
2.17.0
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
