Messages in this thread |  | | Date | Tue, 8 Jan 2013 10:51:20 -0500 (EST) | From | Alan Stern <> | Subject | Re: USB autosuspend vs. URB submission |
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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?
Alan Stern
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