Re: v3.14-rc2+ WARNING: CPU: 0 PID: 24108 at fs/sysfs/group.c:216 sysfs_remove_group+0xa3/0xb0()

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On 17.2.2014 9:41, Ronald wrote:
I caught this by coincidence since I had netconsole attached to debug
a nouveau MSI problem (deadlock). It happenned when I disconnected my
external hardrive in thunar. I have attached my full dmesg.


Sorry for third time, now without HTML,


I've played with latest kernels yesterday and found the same messages after disconnection of one my USB soundcard. After some seeking at lists and testing, i believe this is inconvenient (i originally thought it is related to other problem, which i debugged), but harmless message. According to other threads, where was report, that this popped after Thuderbolt device removal. Error is printed during removal of device sysfs entries, which don't exist at that moment, because its parent sysfs folder is already deleted, if i got that correctly.

relevant threads:
https://bugzilla.kernel.org/show_bug.cgi?id=65281
http://www.spinics.net/lists/linux-scsi/msg70154.html
http://forums.funtoo.org/viewtopic.php?pid=10327
https://lkml.org/lkml/2013/11/23/102

There was patch in latest mentioned thread by Mika Westerberg, but it is not possible to apply to 3.14 as there was some additional rework done at sysfs.

Best regards,

Michal



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