linux-kernel - Re: [PATCH 6/9] s390/block/dasd_genhd: add error handling support for add

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Message-ID: <YT8O/NL2pEGUjYj9@infradead.org>
Date:   Mon, 13 Sep 2021 09:42:36 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Jan H??ppner <hoeppner@...ux.ibm.com>
Cc:     Luis Chamberlain <mcgrof@...nel.org>, axboe@...nel.dk,
        gregkh@...uxfoundation.org, chaitanya.kulkarni@....com,
        atulgopinathan@...il.com, hare@...e.de, maximlevitsky@...il.com,
        oakad@...oo.com, ulf.hansson@...aro.org, colin.king@...onical.com,
        shubhankarvk@...il.com, baijiaju1990@...il.com, trix@...hat.com,
        dongsheng.yang@...ystack.cn, ceph-devel@...r.kernel.org,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        sth@...ux.ibm.com, hca@...ux.ibm.com, gor@...ux.ibm.com,
        borntraeger@...ibm.com, oberpar@...ux.ibm.com, tj@...nel.org,
        linux-s390@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-mmc@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/9] s390/block/dasd_genhd: add error handling support
 for add_disk()

On Mon, Sep 13, 2021 at 10:17:48AM +0200, Jan H??ppner wrote:
> I think, just like with some of the other changes, there is some
> cleanup required before returning. I'll prepare a patch and
> come back to you.

If you are touching the dasd probe path anyway, can you look insto
switching to use blk_mq_alloc_disk as well?  Right now dasd allocates
the request_queue and gendisk separately in different stages of
initialization, but unlike SCSI which needs to probe using just the
request_queue I can't find a good reason for that.