Re: [GIT PATCH] USB patches for 2.6.17

Greg KH
2006-06-23T00:38:41Z

On Thu, Jun 22, 2006 at 05:22:30PM -0700, Greg KH wrote:
> On Thu, Jun 22, 2006 at 05:17:32PM -0700, Andrew Morton wrote:
> > Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> > >
> > > Greg KH wrote:
> > > > I saw this once when debugging the usb code, but could never reproduce
> > > > it, so I attributed it to an incomplete build at the time, as a reboot
> > > > fixed it.
> > > >
> > > > Is this easy to trigger for you?
> > > >
> > >
> > > This is the same oops as I posted yesterday: "2.6.17-mm1: oops in
> > > Bluetooth stuff, usbdev_open". I haven't seen it since...
> > >
> >
> > That's a kernel-wide list of USB devices, isn't it? Which means that some
> > driver other than the bluetooth one has got itself freed up while still
> > being on the list.
> >
> > If so, it could be any driver at all..
>
> Hopefully we have the list locked properly while we are walking it, so
> that should not happen, but I'll go back and verify that I got it all
> correct...

Oh crap, that's it. There's a race when a device switches
configurations and the endpoints disappear. I was locking in the wrong
functions... Let me beat on the fix for a bit to make sure I have it
right.

thanks,

greg k-h