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block: cleanup blkdev_bszset 

Use blkdev_get_by_dev instead of bdgrab + blkdev_get.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-09-21 09:19:47 +02:00 committed by Jens Axboe
parent 9301fe7343
commit 478162821d
1 changed files with 6 additions and 7 deletions
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13
block/ioctl.c
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@ -478,15 +478,14 @@ static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
if (get_user(n, argp)) if (get_user(n, argp))
return -EFAULT; return -EFAULT;
if (!(mode & FMODE_EXCL)) { if (mode & FMODE_EXCL)
bdgrab(bdev); return set_blocksize(bdev, n);
if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0)
return -EBUSY;
}
if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))
return -EBUSY;
ret = set_blocksize(bdev, n); ret = set_blocksize(bdev, n);
if (!(mode & FMODE_EXCL)) blkdev_put(bdev, mode | FMODE_EXCL);
blkdev_put(bdev, mode | FMODE_EXCL);
return ret; return ret;
} }