Re: USB disconnect -> kernel panic

[Bdale Garbee <bdale-wvU4uTqWWAI@public.gmane.org>]

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On Tue, 3 Jan 2012 15:58:47 -0800, Greg KH <greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> wrote:
> On Mon, Jan 02, 2012 at 10:22:55AM -0800, Sarah Sharp wrote:
> > On Sat, Dec 24, 2011 at 03:32:26PM -0700, Bdale Garbee wrote:
> > > Hi Sarah!  Merry Christmas!
> > > 
> > > I've been working on another production run of Altus Metrum products
> > > today, and in the process of flashing and calibrating a pile of our
> > > TeleDongle units, I've been seeing sporadic kernel panics when
> > > unplugging them from my notebook USB.  Has now happened three times this
> > > morning. 
> > > 
> > > I'm running 3.1.6 now, but I saw this under 3.1.5 too, at least once.
> > > The notebook is an HP 2540p.
> > > 
> > > Keith suggested I send you the attached photo of my screen showing the
> > > panic info. 
> > 
> > It's somewhere in the tty layer, and doesn't look USB related.  I think
> > Greg KH is the tty maintainer right now, so you might want to ask him.
> 
> We've had some cdc_acm driver problems in the past, but I thought they
> were all resolved.  3.1.3 should have fixed those problems.  We have
> some more cleanups queued up for 3.3, but nothing that should be fixing
> something like this.
> 
> Oliver, any thoughts about this (see the original post on linux-usb for
> the crash dump.)

For what it's worth, it happened to me again today running 3.2.0-rc7.  I
didn't bother photographing the screen again, though I'm happy to do
that if it'll help.

Bdale

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