netdev - Re: Atheros Communications Inc. AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0) 1.0.0.7 md5/sha1 corrupted using NFS and samba (updated) Version 2

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Message-ID: <20130323150655.GA10779@order.stressinduktion.org>
Date:	Sat, 23 Mar 2013 16:06:55 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	rebelyouth <rebelyouth.hacklab@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Atheros Communications Inc. AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0) 1.0.0.7 md5/sha1 corrupted using NFS and samba (updated) Version 2

On Sat, Mar 23, 2013 at 12:54:25AM -0400, rebelyouth wrote:
> I applied your patch on my the kernel 3.7.9 and look like the patch do 
> what you said before :
> 
> "This does not solve the real problem, which I have not yet understood 
> (wrong packets will be discarded now and will be hopefully resend). "
> 
> There are errors on the RX side of the server and the speed is 5~10% 
> less but the files are ok in nfsv4 , SFTP/FTP and samba.
> 
> Maybe the Atheros drivers for windows had a patch for the checksum 
> already in the drivers and the chipset  have some hardware bug, but for 
> me your patch is already an achievement and I really thank you for your 
> time and consideration.

The upstream driver (which is a tarball I found with google
AR81Family-linux-v1.0.1.14.tar.gz) has this function ifdefed out. I have
a couple of more things I want to test as soon as I have access to the
hardware again.  If I don't find a better solution I will submit a patch
which disables rx checksumming as a whole for inclusion to net-next.

Thanks,

  Hannes

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