linux-kernel - Re: [PATCH] SCSI-OSD: Delete an unnecessary check before the function call "put

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Date:	Wed, 24 Jun 2015 16:32:23 +0200
From:	Johannes Thumshirn <jthumshirn@...e.de>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	Benny Halevy <bhalevy@...marydata.com>,
	Boaz Harrosh <openosd@...il.com>,
	"James E. J. Bottomley" <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] SCSI-OSD: Delete an unnecessary check before the
 function call "put_disk"

On Wed, Jun 24, 2015 at 04:16:34PM +0200, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Wed, 24 Jun 2015 16:06:21 +0200
> 
> The put_disk() 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>
> ---
>  drivers/scsi/osd/osd_uld.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/osd/osd_uld.c b/drivers/scsi/osd/osd_uld.c
> index 243eab3..e2075522 100644
> --- a/drivers/scsi/osd/osd_uld.c
> +++ b/drivers/scsi/osd/osd_uld.c
> @@ -407,9 +407,7 @@ static void __remove(struct device *dev)
>  
>  	OSD_INFO("osd_remove %s\n",
>  		 oud->disk ? oud->disk->disk_name : NULL);
> -
> -	if (oud->disk)
> -		put_disk(oud->disk);
> +	put_disk(oud->disk);
>  	ida_remove(&osd_minor_ida, oud->minor);
>  
>  	kfree(oud);
> -- 
> 2.4.4
> 
> --
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Reviewed-by: Johannes Thumshirn <jthumshirn@...e.de>

-- 
Johannes Thumshirn                                       Storage
jthumshirn@...e.de                             +49 911 74053 689
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