linux-kernel - Re: [PATCH v2] gianfar: Fall back to software tcp/udp checksum on older controllers

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Message-Id: <20110318.151509.241430327.davem@davemloft.net>
Date:	Fri, 18 Mar 2011 15:15:09 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	oakad@...oo.com
Cc:	linux-kernel@...r.kernel.org, galak@...nel.crashing.org,
	cbouatmailru@...il.com, mlcreech@...il.com,
	linuxppc-dev@...ts.ozlabs.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2] gianfar: Fall back to software tcp/udp checksum on
 older controllers

From: Alex Dubov <oakad@...oo.com>
Date: Wed, 16 Mar 2011 20:57:13 -0700 (PDT)

> As specified by errata eTSEC49 of MPC8548 and errata eTSEC12 of MPC83xx,
> older revisions of gianfar controllers will be unable to calculate a TCP/UDP
> packet checksum for some alignments of the appropriate FCB. This patch checks
> for FCB alignment on such controllers and falls back to software checksumming
> if the alignment is known to be bad.
> 
> Signed-off-by: Alex Dubov <oakad@...oo.com>

Applied.
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