linux-kernel - Re: [PATCH] SCSI-zfcp: Delete unnecessary checks before the function call "mempool

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Date:	Fri, 4 Dec 2015 18:57:31 +0100
From:	Benjamin Block <bblock@...ux.vnet.ibm.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	Heiko Carstens <heiko.carstens@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Steffen Maier <maier@...ux.vnet.ibm.com>,
	linux-s390@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] SCSI-zfcp: Delete unnecessary checks before the function
 call "mempool_destroy"

Hej Markus,

On 14:23 Mon 16 Nov     , SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Mon, 16 Nov 2015 14:19:03 +0100
> 
> The mempool_destroy() function tests whether its argument is NULL
> and then returns immediately. Thus the test around the calls is not needed.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/s390/scsi/zfcp_aux.c | 21 +++++++--------------
>  1 file changed, 7 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
> index c00ac46..abc9c93 100644
> --- a/drivers/s390/scsi/zfcp_aux.c
> +++ b/drivers/s390/scsi/zfcp_aux.c
> @@ -248,20 +248,13 @@ static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
> 
>  static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
>  {
> -	if (adapter->pool.erp_req)
> -		mempool_destroy(adapter->pool.erp_req);
> -	if (adapter->pool.scsi_req)
> -		mempool_destroy(adapter->pool.scsi_req);
> -	if (adapter->pool.scsi_abort)
> -		mempool_destroy(adapter->pool.scsi_abort);
> -	if (adapter->pool.qtcb_pool)
> -		mempool_destroy(adapter->pool.qtcb_pool);
> -	if (adapter->pool.status_read_req)
> -		mempool_destroy(adapter->pool.status_read_req);
> -	if (adapter->pool.sr_data)
> -		mempool_destroy(adapter->pool.sr_data);
> -	if (adapter->pool.gid_pn)
> -		mempool_destroy(adapter->pool.gid_pn);
> +	mempool_destroy(adapter->pool.erp_req);
> +	mempool_destroy(adapter->pool.scsi_req);
> +	mempool_destroy(adapter->pool.scsi_abort);
> +	mempool_destroy(adapter->pool.qtcb_pool);
> +	mempool_destroy(adapter->pool.status_read_req);
> +	mempool_destroy(adapter->pool.sr_data);
> +	mempool_destroy(adapter->pool.gid_pn);
>  }
> 
>  /**
> -- 
> 2.6.2

Looks good to me, will have to wait though till Steffen is back around.

Reviewed-by: Benjamin Block <bblock@...ux.vnet.ibm.com>


                                                    Beste Grüße / Best regards,
                                                      - Benjamin Block
-- 
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