linux-kernel - Re: [REVERT][v3.x.y] EHCI: Update qTD next pointer in QH overlay region during unlink

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Date:	Mon, 4 Feb 2013 17:04:29 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Joseph Salisbury <joseph.salisbury@...onical.com>
cc:	Ben Hutchings <ben@...adent.org.uk>,
	LKML <linux-kernel@...r.kernel.org>, <pkondeti@...eaurora.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Herton Krzesinski <herton.krzesinski@...onical.com>,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: [REVERT][v3.x.y] EHCI: Update qTD next pointer in QH overlay
 region during unlink

On Fri, 1 Feb 2013, Joseph Salisbury wrote:

> Hi Alan,
> 
> There is a tar file[0] attached to the bug report[1].  The tar file 
> contains a few examples of failed and successful recording attempts 
> while collecting usbmon traces.  There is a readme.txt file available 
> after extracting the files.
> 
> The bug reporter states that only the first recording after boot fails. 
> Subsequent recordings succeed will succeed.
> 
> Thanks again for reviewing this, Alan.  Just let me know if you would 
> like any additional data or testing.
> 
> Thanks,
> 
> Joe
> 
> [0] 
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1088733/+attachment/3510887/+files/usbmon-1088733.tar.gz
> [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1088733

I have replied to the original report at bugs.launchpad.net with a
diagnostic patch.  Maybe it will help indicate what's going wrong.

Alan Stern

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