netdev - Re: [net 2/3] net: do not do gso for CHECKSUM_UNNECESSARY in netif_needs

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Message-ID: <1332009716.3022.243.camel@deadeye>
Date:	Sat, 17 Mar 2012 18:41:56 +0000
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
CC:	<davem@...emloft.net>, Yi Zou <yi.zou@...el.com>,
	<netdev@...r.kernel.org>, <gospo@...hat.com>, <sassmann@...hat.com>
Subject: Re: [net 2/3] net: do not do gso for CHECKSUM_UNNECESSARY in
 netif_needs_gso

On Sat, 2012-03-17 at 02:08 -0700, Jeff Kirsher wrote:
> From: Yi Zou <yi.zou@...el.com>
> 
> This is related to fixing the bug of dropping FCoE frames when disabling tx ip
> checksum by 'ethtool -K ethx tx off'. The FCoE protocol stack driver would
> use CHECKSUM_UNNECESSARY on tx path instead of CHECKSUM_PARTIAL (as indicated in
> the 2/2 of this series). To do so, netif_needs_gso() has to be changed here to
> not do gso for both CHECKSUM_PARTIAL and CHECKSUM_UNNECESSARY.
[...]

This should also be documented as valid in include/linux/skbuff.h,
though I don't think the fix should be held up for that.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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