linux-kernel - Re: [PATCH] ixp4xx_hss: Delete an unnecessary check before the function call "dma_pool

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Message-ID: <m3lh9mz2xq.fsf@t19.piap.pl>
Date:	Wed, 25 Nov 2015 13:19:45 +0100
From:	khalasa@...p.pl (Krzysztof Hałasa)
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] ixp4xx_hss: Delete an unnecessary check before the function call "dma_pool_destroy"

SF Markus Elfring <elfring@...rs.sourceforge.net> writes:

> The dma_pool_destroy() function tests whether its argument is NULL
> and then returns immediately. Thus the test around the call is not needed.
>
> This issue was detected by using the Coccinelle software.

> --- a/drivers/net/wan/ixp4xx_hss.c
> +++ b/drivers/net/wan/ixp4xx_hss.c
> @@ -1037,7 +1037,7 @@ static void destroy_hdlc_queues(struct port *port)
>  		port->desc_tab = NULL;
>  	}
>  
> -	if (!ports_open && dma_pool) {
> +	if (!ports_open) {
>  		dma_pool_destroy(dma_pool);
>  		dma_pool = NULL;
>  	}

Acked-by: Krzysztof Halasa <khalasa@...p.pl>
-- 
Krzysztof Halasa

Industrial Research Institute for Automation and Measurements PIAP
Al. Jerozolimskie 202, 02-486 Warsaw, Poland
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