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From: David Miller <davem@davemloft.net>
Subject: Re: [RFC] r8169 : why SG / TX checksum are default disabled
Date: Fri, 20 Jul 2012 09:28:15 -0700 (PDT)
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From: hayeswang <hayeswang@realtek.com>
Date: Sat, 21 Jul 2012 00:01:38 +0800

> However, the hw would also fill in the total length field of IP
> header, so it causes problems.

Why does the HW modify fields we did not ask it to?