From mboxrd@z Thu Jan  1 00:00:00 1970
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: sky2: hw checksum failures
Date: Wed, 06 Sep 2006 07:56:54 +1000
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> Agreed. Actually the checksum value is same hi/lo because there are
> two checksum units and we ask for the same offset on both.

Ok, that explains the (HLEN << 16) | HLEN thing when configuring it...
At this point, best is I dig into the actual values and see what's up.
I'll let you know (I don't have the HW at hand right now)

Ben.