Re: [PATCH v2] gianfar: Fall back to software tcp/udp checksum onolder controllers

From: David Miller
Date: Fri Mar 18 2011 - 18:14:39 EST

From: Alex Dubov <oakad@xxxxxxxxx>
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@xxxxxxxxx>

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