From mboxrd@z Thu Jan  1 00:00:00 1970
From: greg@kroah.com (Greg KH)
Date: Wed, 7 Oct 2009 07:50:00 -0700
Subject: Kernel update to 2.6.31.1 on pxa270: udev and usb storage
	cause kernel Oops
In-Reply-To: <1254915955.26123.7.camel@wks02-lin.nanotronic.local>
References: <1254213562.5586.13.camel@wks02-lin.nanotronic.local>
	<20091003124832.GA15525@n2100.arm.linux.org.uk>
	<20091005225222.GB792@kroah.com>
	<1254915955.26123.7.camel@wks02-lin.nanotronic.local>
Message-ID: <20091007145000.GC26894@kroah.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Oct 07, 2009 at 01:45:55PM +0200, hoefle marco wrote:
> On Mon, 2009-10-05 at 15:52 -0700, Greg KH wrote:
> > On Sat, Oct 03, 2009 at 01:48:32PM +0100, Russell King - ARM Linux wrote:
> > > I think you need to report this to the USB/udev people.
> > > 
> > > On Tue, Sep 29, 2009 at 10:39:22AM +0200, hoefle marco wrote:
> > > > Hello,
> > > > we use Kernel 2.6.30.4 on a PXA270 platform (from Phytec). It works good
> > > > with all peripherals on the Phytec board. 
> > > > For an old Sandisk device (diskonchip) we have a driver ported to 2.6.3x
> > > > as the block device driver API has changed. We thought it will be a wise
> > > > decision to do the porting already to 2.6.3x. 
> > > > However, when using the latest Kernel (and the previous one 2.6.30) with
> > > > all the drivers we used in 2.6.30.4 udev and usb storage seem not to
> > > > work any more.
> > > > Does anybody have an idea why?
> 
> It looks that more things which worked with 2.6.30.4 do not work with
> the latest stable 2.6.31.2 kernel. I get also a Kernel oops when
> rebooting the system.
> 
> What I did to get there:
> I disabled udevd and made the important device nodes static. This
> allowed to boot into the system. I also disabled unnecessary things like
> USB support and the tffs disk-on-chip driver.
> Starting udevd manually does cause the same kernel oops as described at
> the beginning of this thread.
> 
> In addition I get that oops when rebooting the system:
> 
> / # reboot
> The system is going down NOW!
> Sending SIGTERM to all processes
> Sending SIGKILL to all processes
> Requesting system reboot
> Unable to handle kernel paging request at virtual address 20726590
> pgd = c39a0000
> [20726590] *pgd=00000000
> Internal error: Oops: f5 [#2]
> Modules linked in:
> CPU: 0    Tainted: G      D     (2.6.31.2 #3)
> PC is at device_shutdown+0x34/0xbc

I think something else is going on here that is a problem.

Can you turn on debugging for the driver core (CONFIG_DEBUG_DRIVER) and
let us see the kernel log?  I'm guessing that you have a driver that
doesn't like some of the driver core changes that went into 2.6.31.

thanks,

greg k-h