linux-kernel - Re: [PATCH] Input-rmi_bus: Delete an unnecessary check before the function call "of_node

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Message-ID: <20160725183046.GE27415@dtor-ws>
Date:	Mon, 25 Jul 2016 11:30:46 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	linux-input@...r.kernel.org, Andrew Duggan <aduggan@...aptics.com>,
	Christopher Heiny <cheiny@...aptics.com>,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] Input-rmi_bus: Delete an unnecessary check before the
 function call "of_node_put"

On Sun, Jul 24, 2016 at 09:35:56AM +0200, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 24 Jul 2016 07:37:23 +0200
> 
> The of_node_put() 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.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>

Applied, thank you.

> ---
>  drivers/input/rmi4/rmi_bus.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c
> index 253df96..a735806 100644
> --- a/drivers/input/rmi4/rmi_bus.c
> +++ b/drivers/input/rmi4/rmi_bus.c
> @@ -232,10 +232,7 @@ err_put_device:
>  void rmi_unregister_function(struct rmi_function *fn)
>  {
>  	device_del(&fn->dev);
> -
> -	if (fn->dev.of_node)
> -		of_node_put(fn->dev.of_node);
> -
> +	of_node_put(fn->dev.of_node);
>  	put_device(&fn->dev);
>  }
>  
> -- 
> 2.9.2
> 

-- 
Dmitry