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Date:   Tue, 7 Sep 2021 09:29:07 +0800
From:   Ming Lei <ming.lei@redhat.com>
To:     Luis Chamberlain <mcgrof@kernel.org>
Cc:     axboe@kernel.dk, martin.petersen@oracle.com, jejb@linux.ibm.com,
        kbusch@kernel.org, sagi@grimberg.me, adrian.hunter@intel.com,
        beanhuo@micron.com, ulf.hansson@linaro.org, avri.altman@wdc.com,
        swboyd@chromium.org, agk@redhat.com, snitzer@redhat.com,
        josef@toxicpanda.com, hch@infradead.org, hare@suse.de,
        bvanassche@acm.org, linux-scsi@vger.kernel.org,
        linux-nvme@lists.infradead.org, linux-mmc@vger.kernel.org,
        dm-devel@redhat.com, nbd@other.debian.org,
        linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
        Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v3 1/8] scsi/sd: add error handling support for add_disk()
Message-ID: <YTbAYyo0+rqUZ+L0@T590>
References: <20210830212538.148729-1-mcgrof@kernel.org>
 <20210830212538.148729-2-mcgrof@kernel.org>
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On Mon, Aug 30, 2021 at 02:25:31PM -0700, 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.
> 
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
> ---
>  drivers/scsi/sd.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
> index 610ebba0d66e..8c1273fff23e 100644
> --- a/drivers/scsi/sd.c
> +++ b/drivers/scsi/sd.c
> @@ -3487,7 +3487,11 @@ static int sd_probe(struct device *dev)
>  		pm_runtime_set_autosuspend_delay(dev,
>  			sdp->host->hostt->rpm_autosuspend_delay);
>  	}
> -	device_add_disk(dev, gd, NULL);
> +
> +	error = device_add_disk(dev, gd, NULL);
> +	if (error)
> +		goto out_free_index;
> +

The error handling is actually wrong, see 

	https://lore.kernel.org/linux-scsi/c93f3010-13c9-e07f-1458-b6b47a27057b@acm.org/T/#t

Maybe you can base on that patch.


Thanks,
Ming