From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 09 Jul 2015 12:21:11 +0000
Subject: Re: [PATCH] ALSA: hda: Delete an unnecessary check before the function call "kobject_put"
Message-Id: <s5hzj35frns.wl-tiwai@suse.de>
List-Id: <kernel-janitors.vger.kernel.org>
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To: SF Markus Elfring <elfring@users.sourceforge.net>
Cc: Jaroslav Kysela <perex@perex.cz>, alsa-devel@alsa-project.org, LKML <linux-kernel@vger.kernel.org>, kernel-janitors@vger.kernel.org, Julia Lawall <julia.lawall@lip6.fr>

On Wed, 08 Jul 2015 21:31:57 +0200,
SF Markus Elfring wrote:
> 
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Wed, 8 Jul 2015 21:26:02 +0200
> 
> The kobject_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@users.sourceforge.net>

Applied, thanks.


Takashi

> ---
>  sound/hda/hdac_sysfs.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/sound/hda/hdac_sysfs.c b/sound/hda/hdac_sysfs.c
> index 0a6ce3b..089b35f 100644
> --- a/sound/hda/hdac_sysfs.c
> +++ b/sound/hda/hdac_sysfs.c
> @@ -321,8 +321,7 @@ static void widget_tree_free(struct hdac_device *codec)
>  			free_widget_node(*p, &widget_node_group);
>  		kfree(tree->nodes);
>  	}
> -	if (tree->root)
> -		kobject_put(tree->root);
> +	kobject_put(tree->root);
>  	kfree(tree);
>  	codec->widgets = NULL;
>  }
> -- 
> 2.4.5
>