linux-kernel - Re: [PATCH v3 6/8] dm: add add

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Message-ID: <067651b9-f530-2613-a419-6b8c3b11ef88@suse.de>
Date:   Mon, 6 Sep 2021 08:19:02 +0200
From:   Hannes Reinecke <hare@...e.de>
To:     Luis Chamberlain <mcgrof@...nel.org>, axboe@...nel.dk,
        martin.petersen@...cle.com, jejb@...ux.ibm.com, kbusch@...nel.org,
        sagi@...mberg.me, adrian.hunter@...el.com, beanhuo@...ron.com,
        ulf.hansson@...aro.org, avri.altman@....com, swboyd@...omium.org,
        agk@...hat.com, snitzer@...hat.com, josef@...icpanda.com
Cc:     hch@...radead.org, 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 v3 6/8] dm: add add_disk() error handling

On 8/30/21 11:25 PM, Luis Chamberlain 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.
> 
> Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
> ---
>   drivers/md/dm.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@...e.de                              +49 911 74053 688
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