On 21.01.2015 21:16, Alistair Grant wrote: > Hi Matthias, > > On Tue, Jan 20, 2015 at 10:22 AM, Mathias Nyman > <mathias.nyman@xxxxxxxxxxxxxxx> wrote: >> On 19.01.2015 22:02, Devin Heitmueller wrote: >>> Hi Mathias, >>> >>> Thanks for getting back to me. >>> >>>> There are a couple of xhci bugs triggered by dvb devices: >>>> https://bugzilla.kernel.org/show_bug.cgi?id=75521 >>>> https://bugzilla.kernel.org/show_bug.cgi?id=65021 >>>> >>>> The first one (75521) I believe is mostly fixed by patches in 3.18 and early >>>> 3.19-rc, so work on a 3.19-rc kernel to eliminate those issues. >>> ... >>>> The second bug (65021) looks more like your case, it queues two stop_endpoints >>>> commands almost simultaneously, which end up never completing, ->timeout and tear down xhci. >>>> That bug has a debug patch for command ring status, you could try it out to check if >>>> the command queue is running among other details. >>> >>> The second bug definitely looks like what I'm seeing. I'll try your >>> tree and report back my findings. >> >> Ah, let me rebase that tree on top of a more current kernel first. > > I've been following this as it somewhat resembles the problems I'm > experiencing, which I've just formally reported in "Hauppauge > USB-Live2 recording fails on USB3 port". > > It looks like you did the rebase yesterday, so I tried running your > updated kernel. It didn't solve the problems, but was an incremental > improvement since the mainline 3.19rc5 kernel hangs during shutdown, > while your modified kernel shutdown cleanly. > > I've got a syslog with verbose xhci logging (echo -n 'module xhci_hcd > =p' > /sys/kernel/debug/dynamic_debug/control as you suggested above) > if you would like to take a look. It's 2.4M so please let me know how > you would like me to pass it on. I'm Interested yes, anyway is fine. Add it somewhere (bugreport, webpage) and send me the link, or just sending it as an email attachent to me works fine as well. -Mathias -- 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
