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Date:	Tue, 04 Nov 2014 11:33:51 -0800
From:	Joe Perches <joe@...ches.com>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel@...r.kernel.org,
	Steffen Klassert <steffen.klassert@...unet.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org
Subject: Re: [PATCH 1/1 net-next] esp4: remove assignment in if condition

On Tue, 2014-11-04 at 20:28 +0100, Fabian Frederick wrote:

trivia:

> diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
[]
> @@ -392,8 +392,11 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
>  	if (elen <= 0)
>  		goto out;
>  
> -	if ((err = skb_cow_data(skb, 0, &trailer)) < 0)
> +	err = skb_cow_data(skb, 0, &trailer);
> +
> +	if (err < 0)
>  		goto out;

Generally it's better/more common to use

	foo = bar();
	if (!foo)
		[error_handler...]
	
without the blank line between the set
and the test.

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