linux-kernel - Re: [PATCH] scsi:libiscsi: remove unnecessary memset in iscsi_conn

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Message-ID: <44860f67-e626-411e-5ee6-9055ea2d5723@huawei.com>
Date:   Wed, 16 Mar 2022 17:02:58 +0800
From:   Wenchao Hao <haowenchao@...wei.com>
To:     Lee Duncan <lduncan@...e.com>, Chris Leech <cleech@...hat.com>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Mike Christie <michael.christie@...cle.com>
CC:     Wu Bo <wubo40@...wei.com>, <open-iscsi@...glegroups.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Zhiqiang Liu <liuzhiqiang26@...wei.com>,
        Feilong Lin <linfeilong@...wei.com>
Subject: Re: [PATCH] scsi:libiscsi: remove unnecessary memset in
 iscsi_conn_setup

cc open-iscsi@...glegroups.com linux-scsi@...r.kernel.org

On 2022/3/17 6:09, Wenchao Hao wrote:
> iscsi_cls_conn is alloced by kzalloc(), the whole iscsi_cls_conn is
> zero filled already including the dd_data. So it is unnecessary to
> call memset again.
> 
> Signed-off-by: Wenchao Hao <haowenchao@...wei.com>
> Reviewed-by: Wu Bo <wubo40@...wei.com>
> ---
>   drivers/scsi/libiscsi.c | 1 -
>   1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
> index d09926e6c8a8..cf4211c6500d 100644
> --- a/drivers/scsi/libiscsi.c
> +++ b/drivers/scsi/libiscsi.c
> @@ -3045,7 +3045,6 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size,
>   	if (!cls_conn)
>   		return NULL;
>   	conn = cls_conn->dd_data;
> -	memset(conn, 0, sizeof(*conn) + dd_size);
>   
>   	conn->dd_data = cls_conn->dd_data + sizeof(*conn);
>   	conn->session = session;
>