linux-kernel - Re: [PATCH] advansys: Remove redundant assignment to err and n_q

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Date:   Fri, 30 Apr 2021 12:35:40 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     hare@...e.com, jejb@...ux.ibm.com, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] advansys: Remove redundant assignment to err and
 n_q_required

On Fri, Apr 30, 2021 at 05:25:28PM +0800, Jiapeng Chong wrote:
> Variable err and n_q_required is set to '-ENOMEM' and '1', but they are
> either overwritten or unused later on, so these are redundant assignments
> that can be removed.
> 
> Clean up the following clang-analyzer warning:
> 
> drivers/scsi/advansys.c:11235:2: warning: Value stored to 'err' is never
> read [clang-analyzer-deadcode.DeadStores].
> 
> drivers/scsi/advansys.c:8091:2: warning: Value stored to 'n_q_required'
> is never read [clang-analyzer-deadcode.DeadStores].
> 
> drivers/scsi/advansys.c:11484:2: warning: Value stored to 'err' is never
> read [clang-analyzer-deadcode.DeadStores].

I don't want to spend any time figuring out if this is a legitimate patch
or not.  Please stop running these analysers on this driver, and thank
the University of Minnesota for making me suspicious.