netdev - Re: [PATCH 3/5] rds: ib: remove redundant ib_dealloc

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Date:   Thu, 9 Mar 2017 09:16:02 +0100
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     Zhu Yanjun <yanjun.zhu@...cle.com>, santosh.shilimkar@...cle.com,
        netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        rds-devel@....oracle.com
Subject: Re: [PATCH 3/5] rds: ib: remove redundant ib_dealloc_fmr

On 03/09/2017 08:26 AM, Zhu Yanjun wrote:
> The function ib_dealloc_fmr will never be called. As such, it should
> be removed.
> 
> Cc: Joe Jin <joe.jin@...cle.com>
> Cc: Junxiao Bi <junxiao.bi@...cle.com>
> Signed-off-by: Zhu Yanjun <yanjun.zhu@...cle.com>
> ---
>  net/rds/ib_fmr.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/net/rds/ib_fmr.c b/net/rds/ib_fmr.c
> index 4fe8f4f..b807df6 100644
> --- a/net/rds/ib_fmr.c
> +++ b/net/rds/ib_fmr.c
> @@ -78,12 +78,10 @@ struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev, int npages)
>  	return ibmr;
>  
>  out_no_cigar:
> -	if (ibmr) {
> -		if (fmr->fmr)
> -			ib_dealloc_fmr(fmr->fmr);
> +	if (ibmr)
>  		kfree(ibmr);

kfree() already does a NULL check (see
http://lxr.free-electrons.com/source/mm/slab.c#L3811) so no need to do
it here.



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