On Tuesday 12 August 2014 18:27:03 Hans Verkuil wrote: > On 08/12/2014 06:21 PM, Laurent Pinchart wrote: > > Hi Hans, > > > > On Tuesday 12 August 2014 17:38:55 Hans Verkuil wrote: > >> On 08/12/2014 05:07 PM, Hans de Goede wrote: > >>> On 08/07/2014 04:49 PM, Udo van den Heuvel wrote: > >>>> On 2014-08-04 11:17, Laurent Pinchart wrote: > >>>>> (CC'ing Hans de Goede, the pwc maintainer, and the linux-media mailing > >>>>> list) > >>> > >>> Thanks for the bug report. I've been looking into this, and there > >>> seem to be 2 problems: > >>> > >>> 1: xhci_hcd 0000:02:00.0: ERROR: unexpected command completion code > >>> 0x11. > >>> > >>> This seems to be what is causing things to not work with a usb-3 port > >>> for you. Might be fixed by this commit: > >>> https://git.kernel.org/cgit/linux/kernel/git/gregkh/usb.git/commit/drive > >>> rs/usb/host?h=usb-next&id=3213b151387df0b95f4eada104f68eb1c1409cb3 > >>> > >>> Can you please do "lspci -nn", and then copy and paste the output here, > >>> so that we can see what sort of xhci controller you've (and try to > >>> reproduce the problem). > >>> > >>> 2: The triggering of a WARN_ON in __vb2_queue_cancel() when called on > >>> streamoff. I've been looking at the code and I cannot figure out why > >>> this is triggering I'm afraid. > >> > >> You can ignore this one. > >> > >> The uvc driver is doing messy things with vb2 which causes this warning. > >> That said, it will not break things for you. It is just a warning that > >> the driver needs to be improved. > > > > I can certainly take the blame when my code needs to be improved, but in > > this case the webcam is supported by the pwc driver, not the uvc driver > > :-) > > It was a bit confusing, but he has two problems: one pwc, one (the warning) > for uvc. Right, I've missed the second one, my bad. A similar issue was present with the pwc driver, which you have fixed in "[PATCH] pwc: fix WARN_ON" I believe. I'll have a look at the uvcvideo issue. It can be ignored for now. -- Regards, Laurent Pinchart -- 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
