Re: 2.6.20-mm1 USB oops

Oliver Neukum <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]>
Am Samstag, 17. Februar 2007 09:23 schrieb Pete Zaitcev:
> On Sat, 17 Feb 2007 08:51:07 +0100, Oliver Neukum <[email protected]> wrote:
> 
> > Am Samstag, 17. Februar 2007 04:21 schrieb Berck E. Nash:
> > > Oops below, entire console log attached.  Please CC on replies as I'm
> > > not subscribed.
> > > 
> > > [  149.477455] Unable to handle kernel NULL pointer dereference at 0000000000000008 RIP:
> > > [  149.483023]  [<ffffffff8811dec3>] :cdc_acm:acm_probe+0x1dd/0x741
> > 
> > Which modem had you plugged in?
> 
> BTW, Oliver, look at the complete dmesg which Berck attached... It's full
> of EIOs when discovering hubs. I suspect that some transaction ended with
> an error and that got cdc-acm confused. The modem is probably a cellphone.

This is highly likely and I am not sure I can help him in terms of
making his modem run. But probably this oops indicates a flaw in
the driver's error handling and I can fix that.

> But yes, a look at /proc/bus/usb/devices would be helpful.

Yes, I want the cdc extra descriptors to tell which code path runs.

	Regards
		Oliver

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