netdev - Re: [iproute PATCH v2 7/7] ip/tcp_metrics: Simplify process

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Date:	Tue, 21 Jun 2016 09:53:43 -0700
From:	Stephen Hemminger <shemming@...cade.com>
To:	Phil Sutter <phil@....cc>
CC:	Daniel Borkmann <daniel@...earbox.net>,
	David Ahern <dsa@...ulusnetworks.com>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Julien Floret <julien.floret@...nd.com>,
	<netdev@...r.kernel.org>
Subject: Re: [iproute PATCH v2 7/7] ip/tcp_metrics: Simplify process_msg a
 bit

On Tue, 21 Jun 2016 18:18:41 +0200
Phil Sutter <phil@....cc> wrote:

> By combining the attribute extraction and check for existence, the
> additional indentation level in the 'else' clause can be avoided.
> 
> In addition to that, common actions for 'daddr' are combined since the
> function returns if neither of the branches are taken.
> 
> Signed-off-by: Phil Sutter <phil@....cc>
> ---
>  ip/tcp_metrics.c | 45 ++++++++++++++++++---------------------------
>  1 file changed, 18 insertions(+), 27 deletions(-)
> 
> diff --git a/ip/tcp_metrics.c b/ip/tcp_metrics.c
> index f82604f458ada..899830c127bcb 100644
> --- a/ip/tcp_metrics.c
> +++ b/ip/tcp_metrics.c
> @@ -112,47 +112,38 @@ static int process_msg(const struct sockaddr_nl *who, struct nlmsghdr *n,
>  	parse_rtattr(attrs, TCP_METRICS_ATTR_MAX, (void *) ghdr + GENL_HDRLEN,
>  		     len);
>  
> -	a = attrs[TCP_METRICS_ATTR_ADDR_IPV4];
> -	if (a) {
> +	if ((a = attrs[TCP_METRICS_ATTR_ADDR_IPV4])) {

NAK, plus it fails checkpatch