linux-kernel - Re: [PATCH v4 4/6] dm: add add

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Date:   Wed, 6 Oct 2021 09:17:50 -0400
From:   Mike Snitzer <snitzer@...hat.com>
To:     axboe@...nel.dk, martin.petersen@...cle.com, jejb@...ux.ibm.com,
        sagi@...mberg.me, adrian.hunter@...el.com, beanhuo@...ron.com,
        ulf.hansson@...aro.org, avri.altman@....com, swboyd@...omium.org,
        agk@...hat.com, josef@...icpanda.com
Cc:     hch@...radead.org, hare@...e.de, bvanassche@....org,
        ming.lei@...hat.com, linux-scsi@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-mmc@...r.kernel.org,
        dm-devel@...hat.com, nbd@...er.debian.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/6] dm: add add_disk() error handling

On Mon, Sep 27 2021 at  5:59P -0400,
Luis Chamberlain <mcgrof@...nel.org> wrote:

> We never checked for errors on add_disk() as this function
> returned void. Now that this is fixed, use the shiny new
> error handling.
> 
> There are two calls to dm_setup_md_queue() which can fail then,
> one on dm_early_create() and we can easily see that the error path
> there calls dm_destroy in the error path. The other use case is on
> the ioctl table_load case. If that fails userspace needs to call
> the DM_DEV_REMOVE_CMD to cleanup the state - similar to any other
> failure.
> 
> Reviewed-by: Hannes Reinecke <hare@...e.de>
> Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>

Reviewed-by: Mike Snitzer <snitzer@...hat.com>