netdev - Re: [PATCH net-2.6] net: bug fix for vlan + gro issue

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Date:	Wed, 17 Feb 2010 14:40:30 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Ajit Khaparde <ajitk@...verengines.com>
Cc:	davem@...emloft.net, kaber@...sh.net,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-2.6] net: bug fix for vlan + gro issue

On Wed, Feb 17, 2010 at 11:55:43AM +0530, Ajit Khaparde wrote:
>
> Here is the patch:-
> 
> Traffic (tcp) doesnot start on a vlan interface when gro is enabled.
> Even the tcp handshake was not taking place.
> This is because, the eth_type_trans call before the netif_receive_skb
> in napi_gro_finish() resets the skb->dev to napi->dev from the previously
> set vlan netdev interface. This causes the ip_route_input to drop the
> incoming packet considering it as a packet coming from a martian source.
> 
> I could repro this on 2.6.32.7 (stable) and 2.6.33-rc7.
> With this fix, the traffic starts and the test runs fine on both vlan
> and non-vlan interfaces.
> 
> CC: Herbert Xu <herbert@...dor.apana.org.au>
> CC: Patrick McHardy <kaber@...sh.net>
> Signed-off-by: Ajit Khaparde <ajitk@...verengines.com>

Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Thanks a lot!
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