netdev - Re: [PATCH net-next 05/17] ixgb: remove open-coded skb_cow

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Message-ID: <1396097224.3122.1.camel@joe-AO722>
Date:	Sat, 29 Mar 2014 05:47:04 -0700
From:	Joe Perches <joe@...ches.com>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: Re: [PATCH net-next 05/17] ixgb: remove open-coded skb_cow_head.

On Sat, 2014-03-29 at 12:26 +0100, Francois Romieu wrote:
> struct ixgb_adapter *adapter, struct sk_buff *skb)
>         if (likely(skb_is_gso(skb))) {
>                 struct ixgb_buffer *buffer_info;
>                 struct iphdr *iph;
> +               int err;
>  
> -               if (skb_header_cloned(skb)) {
> -                       err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
> -                       if (err)
> -                               return err;
> -               }
> +               err = skb_cow_head(skb, 0);
> +               if (err < 0)
> +                       return err

It seems in many instances you're adding
an unnecessary declaration of err that
shadows an already declared err


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