linux-kernel - Re: [PATCH] ALSA: i2sbus: Deletion of unnecessary checks before the function call "release_and_free

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Date:	Wed, 03 Dec 2014 07:59:53 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	Jaroslav Kysela <perex@...ex.cz>,
	Johannes Berg <johannes@...solutions.net>,
	alsa-devel@...a-project.org, linuxppc-dev@...ts.ozlabs.org,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] ALSA: i2sbus: Deletion of unnecessary checks before the function call "release_and_free_resource"

At Tue, 02 Dec 2014 22:55:57 +0100,
SF Markus Elfring wrote:
> 
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Tue, 2 Dec 2014 22:50:24 +0100
> 
> The release_and_free_resource() 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>

Thanks, applied.


Takashi

> ---
>  sound/aoa/soundbus/i2sbus/core.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/aoa/soundbus/i2sbus/core.c b/sound/aoa/soundbus/i2sbus/core.c
> index a80d5ea..4e2b4fb 100644
> --- a/sound/aoa/soundbus/i2sbus/core.c
> +++ b/sound/aoa/soundbus/i2sbus/core.c
> @@ -79,8 +79,7 @@ static void i2sbus_release_dev(struct device *dev)
>   	if (i2sdev->out.dbdma) iounmap(i2sdev->out.dbdma);
>   	if (i2sdev->in.dbdma) iounmap(i2sdev->in.dbdma);
>  	for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++)
> -		if (i2sdev->allocated_resource[i])
> -			release_and_free_resource(i2sdev->allocated_resource[i]);
> +		release_and_free_resource(i2sdev->allocated_resource[i]);
>  	free_dbdma_descriptor_ring(i2sdev, &i2sdev->out.dbdma_ring);
>  	free_dbdma_descriptor_ring(i2sdev, &i2sdev->in.dbdma_ring);
>  	for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++)
> @@ -323,8 +322,7 @@ static int i2sbus_add_dev(struct macio_dev *macio,
>  	if (dev->out.dbdma) iounmap(dev->out.dbdma);
>  	if (dev->in.dbdma) iounmap(dev->in.dbdma);
>  	for (i=0;i<3;i++)
> -		if (dev->allocated_resource[i])
> -			release_and_free_resource(dev->allocated_resource[i]);
> +		release_and_free_resource(dev->allocated_resource[i]);
>  	mutex_destroy(&dev->lock);
>  	kfree(dev);
>  	return 0;
> -- 
> 2.1.3
> 
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