[Precise PATCH] USB: Fix 'bad dma' problem on WDM device disconnect

[Ming Lei]

On Thu, Dec 13, 2012 at 10:34 PM, Leann Ogasawara
<leann.ogasawara at canonical.com> wrote:
>> commit 7a55df4694e1758a7a1c3b1432e36fca0c859d6a
>> Author: Bjørn Mork <bjorn at mork.no>
>> Date:   Mon Jan 16 15:11:59 2012 +0100
>>
>>     USB: cdc-wdm: better allocate a buffer that is at least as big as
>> we tell the USB core
>
> I'm still a little confused... The above patch is also already in
> Precise.  We pulled it in via upstream stable.

Yes, that is just the problem because it is the patch which causes
the 'bad dma' error in LP1081879 and coherent memory leak.

The patch should have done the change in both allocation and free,
but it only did it in allocation.

Thanks,
--
Ming Lei