On Wed, Aug 14, 2013 at 03:38:04PM +0200, Andreas Lillebø Holm wrote: > Hi, > > On Tuesday, August 13, 2013 at 8:40 PM, Greg KH wrote: > > > When communicating with AT90USB1287, at random intervals (1/25 boots) > > > the linux hid_output_field Oopses and kills the communicating thread. > > > The AT90USB1287 microcontroller uses LUFA library for usb/hid > > > communication. It is trigged by a ioctl call from userspace and fails > > > in a kernel paging request. The system is after the oops in a state > > > where no hid commands is sent anymore and only a boot can fix the > > > system. > > > > > > Keywords: usbhid hid > > > > > > Kernel version: Linux version 3.8.13-03081301-generic (apw@gomeisa) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201305311535 SMP Fri May 31 19:44:30 UTC 2013 > > > > > > Oopses: > > > http://paste.debian.net/24305 > > > http://paste.debian.net/24306 > > > http://paste.debian.net/24307 > > > > > > Code: > > > The error is triggered by: > > > ioctl(fd,HIDIOCSUSAGES, &ref_multi_u); > > > ioctl(fd,HIDIOCSREPORT, &rep_info_u); > > > > > > Notes: > > > It is very hard to reproduce so seems like race condition… > > > > > > Any tips to resolve/workaround this issue is appreciated and please > > > let me know if my information is incomplete (This is my first kernel > > > bug report) > > > > > > > > > > Any chance you can try a supported kernel, like 3.10.6 or 3.11-rc5 to > > see if that also causes problems? We can't do anything with > > distro-specific kernel releases like your 3.8.13 release from Ubuntu, > > sorry. > > > I've now tried with kernel 3.10.6 (http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10.6-saucy/) and I can trigger the same issue on this kernel. > > Here is a paste from last Oops on this kernel: > http://paste.debian.net/24993/ > > I am also using usbmon to monitor the usb bus traffic, but cannot see anything that should cause the driver to Oops. > > Is there any way to find out what can trigger this issue? Jiri should be the one to know this, Jiri, any ideas? greg k-h -- 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
