netdev - Bug in drivers/net/ethernet/freescale/fec_main.c, TX is broken. In 4.0.0-rc3

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Date:	Mon, 09 Mar 2015 22:50:28 +0300
From:	Панов Андрей <rockford@...dex.ru>
To:	Nimrod Andy <b38611@...escale.com>, netdev@...r.kernel.org
Subject: Bug in drivers/net/ethernet/freescale/fec_main.c, TX is broken. In 4.0.0-rc3

Hello!

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.

--
 Андрей
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