linux-kernel - Re: [PATCH] scsi: ufs: Fix divide zero case in ufshcd_map

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Message-ID: <7a324bb2-c748-4d48-8f55-13f35de5a35e@acm.org>
Date:   Mon, 14 Feb 2022 15:14:51 -0800
From:   Bart Van Assche <bvanassche@....org>
To:     j-young.choi@...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>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        Daejun Park <daejun7.park@...sung.com>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] scsi: ufs: Fix divide zero case in ufshcd_map_queues()

On 2/14/22 02:33, Jinyoung CHOI wrote:
> Before calling blk_mq_map_queues(), the mq_map and nr_queues belonging
> to "struct blk_mq_queue_map" must be a vaild value.
                                     ^^   ^^^^^
                                   have   valid

> If nr_queues is set to 0, the system may encounter the "divide zero"
> depending on the type of architecture.

Anyway:

Reviewed-by: Bart Van Assche <bvanassche@....org>