linux-kernel - Re: Null Pointer BUG in uhci

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Date:	Wed, 8 Jul 2009 15:57:26 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Michael S. Zick" <lkml@...ethan.org>
cc:	Oliver Neukum <oliver@...kum.org>, Jiri Kosina <jkosina@...e.cz>,
	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
Subject: Re: Null Pointer BUG in uhci_hcd

On Wed, 8 Jul 2009, Michael S. Zick wrote:

> But, then again, we might just get lucky:
> ehci_hcd 0000:00:10.4: Unlink after no-IRQ?  Controller is probably using the wrong IRQ.
> usb 1-5: khubd timed out on ep0in len=18/64

Like I've been telling you all along, the hardware isn't working.  I 
suspect it's worse than a simple interrupt-routing mistake.

> > > For more information enable CONFIG_USB_DEBUG and CONFIG_DEBUG_FS, then 
> > > see what's sitting in the usb/uhci/* files in debugfs.
> > > 
> 
> Anything in particular to look for/at?

Just post the contents of those files.

Alan Stern

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