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 20:48, Alan Stern wrote:

This isn't a USB problem.

Hello,

I'm experiencing very similar messages after every disconnection of USB soundcard (snd-usb-audio module). During searching for other similar occurrences of message, i've found few patches. One kind basically prevents sysfs from popping those messages at sysfs group attribute removal - https://lkml.org/lkml/2013/11/23/102 and isn't included in 3.14-rc2, other kind of patches, if i got that correctly, fixes removal ordering or its visibility at underlying subsystem (eg. SCSI, PCI for Thunderbolt hotplugging) to make sysfs happy. Do you know, that there was some general decision, to intentionally don't modify sysfs and fix that for every subsystem, which triggers that messages? Just asking, because then it would be probably nice to modify something also at USB audio..

my dmesg with WARNING:
http://vpub.smucr.cz/pub/bbb/debug/dmesg-reconnections.log
and i probably not alone:
http://forums.funtoo.org/viewtopic.php?pid=10327

Best regards,

Michal Smucr

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