At Wed, 05 Nov 2014 13:39:30 +0100, Takashi Iwai wrote:
At Wed, 05 Nov 2014 12:33:37 +0100, Takashi Iwai wrote:
At Wed, 22 Oct 2014 08:36:50 +0200, Takashi Iwai wrote:
- When unloading a device there are numerous sysfs_remove_group issues:
usb 1-1.1: USB disconnect, device number 6 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 54 at /build/buildd/linux-3.16.0/fs/sysfs/group.c:219 sysfs_remove_group+0x99/0xa0() sysfs group ffffffff82cbd6e0 not found for kobject 'midi1'
(snip)
However this issue occured even without the patch applied.
Yes, there was a similar report, but we couldn't reproduce here. It's a Oops coming from OSS midi device. This is fairly harmless, but annoying. Could you give your kernel config? Maybe there's some difference.
I'm now checking this issue again, and I still couldn't reproduce it on my local machines. Could you give your kernel config if this still happens?
Also, as a blind shot: does the patch below give any difference?
Try the one below instead. This is for 3.18 but should be applicable to older kernels, too. (It's not applicable to for-next branch due to the recent cleanups, though.)
The patch was confirmed to fix, at least, for 3.14 kernel: https://bugzilla.kernel.org/show_bug.cgi?id=80931
I'll resubmit a proper patch to ML.
Takashi