linux-kernel - Re: [2.6.27-rc7] oops in usbcore

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Date:	Fri, 24 Oct 2008 15:16:39 -0700
From:	Greg KH <greg@...ah.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Folkert van Heusden <folkert@...heusden.com>,
	Oliver Neukum <oliver@...kum.org>,
	linux-kernel@...r.kernel.org, USB list <linux-usb@...r.kernel.org>
Subject: Re: [2.6.27-rc7] oops in usbcore

On Fri, Oct 24, 2008 at 06:13:03PM -0400, Alan Stern wrote:
> On Fri, 24 Oct 2008, Rafael J. Wysocki wrote:
> 
> > On Thursday, 9 of October 2008, Folkert van Heusden wrote:
> > > > > lpc-ntpd is a atomic clock receiver driver doing read()-calls on an fd
> > > > > from a serial device (connected via usb), nothing fancy
> > > > > (http://vanheusden.com/lpc-ntpd/ ).
> > > > 
> > > > Which devices? Please post lsusb -v
> > > 
> > > thegate:/home/folkert# lsusb  -v > lsusb
> > > cannot read device status, Broken pipe (32)
> > > 
> > > Isn't that error odd?
> > > 
> > > The output is:
> 
> ...
> 
> > > > But you do get this oops even without running that script, don't you?   
> > > 
> > > No, only with that script.
> > 
> > Is this still reproducible in mainline?
> > 
> > If not, is it reproducible with 2.6.27 final?
> 
> I submitted a patch for this:
> 
> 	http://marc.info/?l=linux-usb&m=122461735606713&w=2
> 
> It hasn't been merged yet, in any tree.

I'm a bit hesitant to add it for .28, especially as this isn't a
"regression" per-say, but something that we have always done wrong, and
it changes the core USB code.

But, I can probably be convinced otherwise if needed :)

thanks,

greg k-h
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