On Fri, 27 Jan 2012, Johan Hovold wrote: > On Fri, Jan 27, 2012 at 08:25:10PM +0000, Ross Ryles wrote: > > > Can you reproduce it on a vanilla kernel? > > > > I've just reproduced it on vanilla 3.2.1 and with debug enabled. Log attached. > > Excellent. The backtrace at the end points to your host controller (at > least ftdi_sio is not to blame). The generic usb_serial close is killing > the read_urb and then something goes wrong. > > What do you say about this, Alan? It could be a hardware problem in the OHCI host controller. Ross, can you run a kernel with CONFIG_USB_DEBUG enabled? Then when the hang occurs, go into /sys/kernel/debug/usb/ohci/0000:00:02.0 and post copies of the files in there. Alan Stern -- 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
