linux-kernel - Re: [PATCH v2] blk: avoid divide-by-zero with zero granularity

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Message-ID: <DM5PR0401MB3591FDAC44CD5665D6CEBDC39BAA0@DM5PR0401MB3591.namprd04.prod.outlook.com>
Date:   Tue, 12 Jan 2021 17:36:01 +0000
From:   Johannes Thumshirn <Johannes.Thumshirn@....com>
To:     Feng Li <lifeng1519@...il.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
CC:     Li Feng <fengli@...rtx.com>, Jens Axboe <axboe@...nel.dk>,
        "open list:BLOCK LAYER" <linux-block@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] blk: avoid divide-by-zero with zero granularity

On 12/01/2021 18:29, Feng Li wrote:
> I use the nvme-tcp as the host, the target is spdk nvme-tcp target,
> and set a wrong block size(i.g. bs=8), then the host prints this oops:

I think the better fix here is to reject devices which report a block size
small than a sector.