netdev - Re: [PATCH] ehea: Fix a checksum issue on the receive path

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Message-Id: <20101009.092043.58419374.davem@davemloft.net>
Date:	Sat, 09 Oct 2010 09:20:43 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	leitao@...ux.vnet.ibm.com, netdev@...r.kernel.org, fubar@...ibm.com
Subject: Re: [PATCH] ehea: Fix a checksum issue on the receive path

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Fri, 08 Oct 2010 16:36:17 +0200

> I am pretty sure most (if not all) netdev drivers pass the packet with
> invalid checksum to upper stack, so that we can increment appropriate
> SNMP counters, in IP stack or UDP/TCP/whatever stack.
> 
> tg3, bnx2, e1000, skge, sky2, bnx2x, niu, r8169, igb, ... seems to do
> that.

Drivers _must_ send up all packets, even those with bad checksums,
without exception.

Otherwise protocol statistics get lost, netfilter log entries go
missing, etc.
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