linux-kernel - Re: 2.6.36-rc7: NULL pointer dereference in ehci_clear_tt_buffer

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Message-ID: <4CC41D61.7020303@s5r6.in-berlin.de>
Date:	Sun, 24 Oct 2010 13:49:53 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	David Brownell <david-b@...bell.net>,
	USB list <linux-usb@...r.kernel.org>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.36-rc7: NULL pointer dereference in ehci_clear_tt_buffer_complete

Alan Stern wrote:
> Okay, here's a patch which definitely causes the problem to surface.  
> It contains some extra debugging printouts but you can ignore them.  Or 
> you can edit out the hunks that affect ehci-q.c.
> 
> Ideally, you would test this while forcing the card reader to run at
> full speed, by putting a USB-1.1 hub between the monitor and the card
> reader.  But if you don't have one available, don't worry -- the error
> message should still appear even though it won't lead to an oops.
> 
> And of course, when you run this along with the proposed fix, the error 
> message should go away.  :-)

Thanks, I will try it RSN, hopefully one of the next few days.
-- 
Stefan Richter
-=====-==-=- =-=- ==---
http://arcgraph.de/sr/
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