linux-kernel - Re: [PATCH] scsi: ufs: remove redundant initialization of variable

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Message-ID: <3c5dde7cd24cf10707b682cce0cac74e5ac37e9b.camel@gmail.com>
Date:   Fri, 30 Apr 2021 10:47:46 +0200
From:   Bean Huo <huobean@...il.com>
To:     keosung.park@...sung.com, ALIM AKHTAR <alim.akhtar@...sung.com>,
        "avri.altman@....com" <avri.altman@....com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "jaegeuk@...nel.org" <jaegeuk@...nel.org>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     Daejun Park <daejun7.park@...sung.com>,
        Sung-Jun Park <sungjun07.park@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>
Subject: Re: [PATCH] scsi: ufs: remove redundant initialization of variable

On Fri, 2021-04-30 at 11:14 +0900, Keoseong Park wrote:
> The variable d_lu_wb_buf_alloc may be repeatedly initialized to 0 in
> a for-loop.
> 
> If the variable is set to a value other than 0, it exits the for-
> loop, so there is no need to reset it to 0.
> 
> 
> 
> Since lun and d_lu_wb_buf_alloc are just being used in a else
> statement inside a local scope, move the declaration of the variables
> to that scope.
> 
> 
> 
> Signed-off-by: Keoseong Park <keosung.park@...sung.com>

UFS Spec 3.1, bDeviceMaxWriteBoosterLUs is 01h, for LU dedicated buffer
mode, WriteBooster Buffer can be configured in only one logical unit.

Bean