netdev - Re: [PATCH] net: 802.1q: make vlan_hwaccel_do

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Date:	Sun, 22 Aug 2010 21:03:04 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	xiaosuo@...il.com
Cc:	kaber@...sh.net, netdev@...r.kernel.org,
	herbert@...dor.apana.org.au
Subject: Re: [PATCH] net: 802.1q: make vlan_hwaccel_do_receive() return void

From: Changli Gao <xiaosuo@...il.com>
Date: Mon, 23 Aug 2010 07:31:58 +0800

> @@ -2841,8 +2841,8 @@ static int __netif_receive_skb(struct sk_buff *skb)
>  	if (!netdev_tstamp_prequeue)
>  		net_timestamp_check(skb);
>  
> -	if (vlan_tx_tag_present(skb) && vlan_hwaccel_do_receive(skb))
> -		return NET_RX_SUCCESS;
> +	if (vlan_tx_tag_present(skb))
> +		vlan_hwaccel_do_receive(skb);
>  

Ok, I see how this happened.  The code here first came from
Patrick:

commit 9b22ea560957de1484e6b3e8538f7eef202e3596
 ...
    net: fix packet socket delivery in rx irq handler

And back then vlan_hwaccel_do_receive() returned "-1" and freed the
packet if cb->dev was NULL.

Herbert then added the GRO containers in:

commit e1c096e251e52773afeffbbcb74d0a072be47ea3
 ...
    vlan: Add GRO interfaces

where skb->dev now stores what cb->dev used to, and the "-1"
return and cb->dev check were thus removed.

Anyways, with how things stand now this patch looks fine and
I'll apply it to net-next-2.6, thanks!
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