On Tue, Jan 08, 2013 at 10:51:20AM -0500, Alan Stern wrote: > On Mon, 7 Jan 2013, Josh Boyer wrote: > > > Hi, > > > > We've had a few reports in Fedora of users hitting the WARN_ONCE in > > drivers/usb/core/urb.c that prints a warning about a usb_submit_urb > > being called on an active URB. One of them[1] is from the ums_realtek > > driver and the other[2] is from the uvcvideo driver. However, I noticed > > that in both instances it seems the devices were coming back from what I > > think is autosuspend. > > > > I didn't immediately find any similar reports, and to my rather > > inexperienced eyes the drivers didn't seem to be doing anything clearly > > wrong. I'm wondering if anyone has some possible ideas for debugging > > and whether or not this might be a general issue? > > I don't see anything wrong either. > > Can you ask the users to collect a usbmon trace covering the period > when the problem occurs? I'll certainly ask. I'm not particularly hopeful for great results though, as the problems seem to be rather intermittent. Thanks for taking a look. josh -- 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
