On Thu, Jan 10, 2013 at 7:05 AM, Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote: > > I've never heard of such problems with the uvcvideo driver, and I don't see > anything wrong with the code at first sight. The driver only submits URBs when IMO, there is a minor fault in the error handling path of uvc_status_start() inside uvc_v4l2_open(), and the 'users' count should have been decreased before usb_autopm_put_interface(). In theory, the warning can be triggered when the device is opened just between usb_autopm_put_interface() and atomic_dec(&stream->dev->users), but I don't think it is the cause of the report. > starting the video capture (at that point no URB should be in flight) or in > the URB completion handler (by definition the URB has completed then). > > I've had a quick look at the trace posted at > https://bugzilla.redhat.com/show_bug.cgi?id=879462 but usbmon only shows URBs > that are successfully submitted. I'm not sure what useful information I could > get from the trace. It might be useful to post the relevant 'dmesg' and the usbmon together. Thanks, -- Ming Lei -- 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
