linux-kernel - Re: [PATCH 2/14] net: axienet: delete unneeded test before of_node

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Date:	Fri, 8 Aug 2014 12:44:59 +0200
From:	Michal Simek <michal.simek@...inx.com>
To:	Julia Lawall <Julia.Lawall@...6.fr>,
	Anirudha Sarangi <anirudh@...inx.com>
CC:	<kernel-janitors@...r.kernel.org>,
	John Linn <John.Linn@...inx.com>,
	Michal Simek <michal.simek@...inx.com>,
	<netdev@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH 2/14] net: axienet: delete unneeded test before 
	of_node_put

On 08/08/2014 12:07 PM, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@...6.fr>
> 
> Of_node_put supports NULL as its argument, so the initial test is not
> necessary.
> 
> Suggested by Uwe Kleine-König.
> 
> The semantic patch that fixes this problem is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression e;
> @@
> 
> -if (e)
>    of_node_put(e);
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  drivers/net/ethernet/xilinx/xilinx_axienet_main.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> index 7b0a735..30e8608 100644
> --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> @@ -1630,8 +1630,7 @@ static int axienet_of_remove(struct platform_device *op)
>  	axienet_mdio_teardown(lp);
>  	unregister_netdev(ndev);
>  
> -	if (lp->phy_node)
> -		of_node_put(lp->phy_node);
> +	of_node_put(lp->phy_node);
>  	lp->phy_node = NULL;
>  
>  	iounmap(lp->regs);
> 

Reviewed-by: Michal Simek <michal.simek@...inx.com>

Thanks,
Michal


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