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.el...@ideasonboard.com>
---
Changes in v2: Nothing
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 fa34dcbe1197..5bb79888e3f7 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -374,9 +374,12 @@ 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
--
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