On Fri, Mar 06, 2015 at 11:24:27PM +0100, Martin Pieuchot wrote: > On 06/03/15(Fri) 22:06, Remi Locherer wrote: > > On Fri, Mar 06, 2015 at 09:15:23AM +0100, Stefan Sperling wrote: > > > On Fri, Mar 06, 2015 at 08:45:20AM +0100, Remi Locherer wrote: > > > > Hi, > > > > > > > > Since about fall 2014 I see "urtwn0 timeout" every now an then like > > > > others that reported it. An unplug and replut of the urtwn device > > > > usually helped. > > > > > > > > But with the snapshots from March 1st and 3rd the system just freezes > > > > when I unplug the urtwn device after I see the timeout message in > > > > xconsole. The system just freezes and does not drop to ddb. > > > > > > > > With the snapshot from February 20 I did not observe these freezes. > > > > > > > > Outputs of lsusb -v and dmesg below. > > > > > > > > Remi > > > > > > > > > > Hi Remi, > > > > > > I've discussed this with mpi. We're unsure what's going on exactly. > > > > > > Can you please really make sure you're not dropping into ddb (i.e. > > > don't detach the device while in X, but when on console)? > > > > Your assumption is right! Switching from X to console _before_ unplugging > > the urtwn device gives me an ddb promt. I made photos from trace and ps: > > > > * page fault trap: https://relo.ch/urtwn_freeze/IMG_20150306_184105.jpg > > * trace cpu 0 - 3: https://relo.ch/urtwn_freeze/IMG_20150306_192412.jpg > > * ps part 1: https://relo.ch/urtwn_freeze/IMG_20150306_192537.jpg > > * ps part 2: https://relo.ch/urtwn_freeze/IMG_20150306_192708.jpg > > It looks like we're trying to remove a transfer from the list of pending > xfers when it has not yet been added to it. > > Could you tell me if the diff below fixes your issue?
I built a kernel with this diff and the diff from Stefan applied on a cvs checkout from yesterday. I could provoke an urtwn0 timeout with running speedtest-cli. * TX status and page fault trap: https://relo.ch/urtwn_freeze/IMG_20150307_134913.jpg * trace cpu 2,0,1,3: https://relo.ch/urtwn_freeze/IMG_20150307_135150.jpg I tested the same with urtwn plugged to the xhci port. The timeout also happens but I can unplug the device without the system dropping to ddb.
