Re: 2.6.16-rc5 pppd oops on disconnects

[Bob Copeland]

> > Call Trace:
> >  [<c017592e>] sysfs_hash_and_remove+0x34/0x10a
> >  [<c01e756e>] class_device_del+0xa0/0x11c
> >  [<c01e75f5>] class_device_unregister+0xb/0x16
> >  [<d01f81f3>] acm_tty_unregister+0x1d/0x63 [cdc_acm]
>
> This looks more like
> http://bugzilla.kernel.org/show_bug.cgi?id=5876

Hmm... it looks different from that bug - in that case the root cause
was sysfs_make_dirent failing, presumably when the sysfs node for the
device was being set up, by unplugging and re-plugging the device a
lot.  Here it's oopsing when the node is being removed, after it's
been in use a while and unplugged only once.  But yes ppp may not have
anything to do with it.  I'll try it on an older kernel to see if I
can reproduce there...

-Bob
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