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Subject: Re: [PATCH 08/14] dasd: cleanup dasd_scan_partitions
To:     Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>
Cc:     Josef Bacik <josef@toxicpanda.com>,
        Minchan Kim <minchan@kernel.org>,
        Jan Hoeppner <hoeppner@linux.ibm.com>,
        Joseph Qi <joseph.qi@linux.alibaba.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Pavel Machek <pavel@ucw.cz>, Len Brown <len.brown@intel.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-kernel@vger.kernel.org, nbd@other.debian.org,
        linux-ide@vger.kernel.org, linux-s390@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, ocfs2-devel@oss.oracle.com,
        linux-pm@vger.kernel.org, linux-mm@kvack.org,
        linux-block@vger.kernel.org
References: <20200921071958.307589-1-hch@lst.de>
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From:   Stefan Haberland <sth@linux.ibm.com>
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Message-ID: <88ca251c-c417-cd92-3d47-653dff346d7c@linux.ibm.com>
Date:   Tue, 22 Sep 2020 17:18:59 +0200
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Precedence: bulk

Am 21.09.20 um 09:19 schrieb Christoph Hellwig:
> Use blkdev_get_by_dev instead of bdget_disk + blkdev_get.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Beside what Sergei mentioned...

Reviewed-by: Stefan Haberland <sth@linux.ibm.com>


> ---
>  drivers/s390/block/dasd_genhd.c | 15 ++++-----------
>  1 file changed, 4 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
> index af5b0ecb8f8923..a9698fba9b76ce 100644
> --- a/drivers/s390/block/dasd_genhd.c
> +++ b/drivers/s390/block/dasd_genhd.c
> @@ -101,18 +101,11 @@ int dasd_scan_partitions(struct dasd_block *block)
>  	struct block_device *bdev;
>  	int rc;
>  
> -	bdev = bdget_disk(block->gdp, 0);
> -	if (!bdev) {
> -		DBF_DEV_EVENT(DBF_ERR, block->base, "%s",
> -			      "scan partitions error, bdget returned NULL");
> -		return -ENODEV;
> -	}
> -
> -	rc = blkdev_get(bdev, FMODE_READ, NULL);
> -	if (rc < 0) {
> +	bdev = blkdev_get_by_dev(disk_devt(block->gdp), FMODE_READ, NULL);
> +	if (IS_ERR(bdev)) {
>  		DBF_DEV_EVENT(DBF_ERR, block->base,
> -			      "scan partitions error, blkdev_get returned %d",
> -			      rc);
> +			      "scan partitions error, blkdev_get returned %ld",
> +			      PTR_ERR(bdev));
>  		return -ENODEV;
>  	}
>