netdev - Re: [PATCH 3/3] net: Fix drivers advertising HW_CSUM feature to use csum

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Message-ID: <20101214190727.0ed1a925@nehalam>
Date:	Tue, 14 Dec 2010 19:07:27 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Michał Mirosław <mirq-linux@...e.qmqm.pl>
Cc:	netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net,
	Vasanthy Kolluri <vkolluri@...co.com>,
	Roopa Prabhu <roprabhu@...co.com>,
	David Wang <dwang2@...co.com>,
	Andrew Gallatin <gallatin@...i.com>,
	Brice Goglin <brice@...i.com>,
	Shreyas Bhatewara <sbhatewara@...are.com>,
	"VMware, Inc." <pv-drivers@...are.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Jiri Pirko <jpirko@...hat.com>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>,
	Jie Yang <Jie.Yang@...eros.com>, Joe Perches <joe@...ches.com>
Subject: Re: [PATCH 3/3] net: Fix drivers advertising HW_CSUM feature to use
 csum_start

On Wed, 15 Dec 2010 02:24:08 +0100 (CET)
Michał Mirosław <mirq-linux@...e.qmqm.pl> wrote:

> Some drivers are using skb_transport_offset(skb) instead of skb->csum_start
> for NETIF_F_HW_CSUM offload.  This does not matter now, but if someone
> implements checksumming of encapsulated packets then this will break silently.
> 
> TSO output paths are left as they are, since they are for IP+TCP only
> (might be worth converting though).
> 
> Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>

Which if any of these drivers did you test on real hardware?


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