At Mon, 21 Feb 2011 08:19:11 -0800, Sarah Sharp wrote: > > On Mon, Feb 21, 2011 at 03:56:52PM +0100, Takashi Iwai wrote: > > At Mon, 21 Feb 2011 06:47:20 -0800, > > Sarah Sharp wrote: > > > > > > Are you saying that the endpoint that is stalling is not a control > > > endpoint, but it is advertised with an endpoint address of zero? I > > > can't figure out what "no ctrl" means. :) > > > > Sorry for unclearness. I meant as cmd_ring instead ctrl. The > > affected ring is associated with slot 1 ep0 (judging from my debug > > code), neither event_ring nor cmd_ring. > > > > > I was wondering what type of endpoint was stalling, since the USB audio > > > devices I have advertises one isochronous endpoint. Isochronous > > > endpoints aren't supposed to stall, although I know there was a > > > clarification to the xHCI 1.0 spec to say that xHCI hosts weren't > > > supposed to stall an isoc endpoint, so there may be some buggy 0.96 xHCI > > > hosts that do stall an isoc endpoint. > > > > It has mixer controls? The error seems happening before actually > > handling isoc ep. It's during parsing interfaces and parsing the > > mixer topology, etc, in usb-audio driver. > > Ah, ok, makes sense. > > > > Can you give me the lsusb for your device? I'll try to get a patch for > > > the stall dequeue updates to you this morning. > > > > OK, attached below. > > From your roothub descriptors, it looks like you're running 2.6.32.27? > The 2.6.32 stable kernel doesn't include support for isochronous > transfers, because it was such a large feature that we didn't want to > backport it. In fact, I'm not even sure 2.6.32 had stall support, or > support for setting alternate interface settings, since those both > required API changes to the USB core. > Can you try 2.6.37 instead? Ah, sorry for confusion. The problem _is_ in 2.6.38-rc5 kernel. (I tried 2.6.37, of course, but it didn't work :) I took lsusb output on a machine just running now with a USB-audio device plugged in. So, just ignore the kernel version in the output. thanks, Takashi -- 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
