netdev - Re: [PATCH net] Revert "net: fec: fix the warning found by dma debug"

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Date:	Fri, 13 Mar 2015 13:10:50 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	festevam@...il.com
Cc:	b38611@...escale.com, netdev@...r.kernel.org, rockford@...dex.ru,
	fabio.estevam@...escale.com
Subject: Re: [PATCH net] Revert "net: fec: fix the warning found by dma
 debug"

From: Fabio Estevam <festevam@...il.com>
Date: Fri, 13 Mar 2015 14:07:54 -0300

> From: Fabio Estevam <fabio.estevam@...escale.com>
> 
> This reverts commit 2b995f63987013bacde99168218f9c7b252bdcf1.
> 
> Панов Андрей reported the following regression:
> 
> "Commit 2b995f63987013bacde99168218f9c7b252bdcf1 in 4.0.0-rc3 introduces a
> nasty bug in transmit, corrupting packets.
> 
> To reproduce:
> 
> $ dd if=/dev/zero of=zeros bs=1M count=20
> $ md5sum -b zeros
> 8f4e33f3dc3e414ff94e5fb6905cba8c *zeros
> 
> This checksum is correct.
> 
> Copy file "zeros" to another host with NFS, and it gets corrupted, checksum is
> changed.
> File should be big, small amounts of transmit isn't affected.
> 
> I use an i.MX6 Quad board.
> 
> If this commit is reverted, all works fine."
> 
> Reported-by: Панов Андрей <rockford@...dex.ru>
> Signed-off-by: Fabio Estevam <fabio.estevam@...escale.com>

Applied, thanks.
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