From: Christoph Hellwig <hch@lst.de>
Date: Mon, 21 Sep 2020 07:19:47 +0000 (+0200)
Subject: block: cleanup blkdev_bszset
X-Git-Tag: v5.15~2716^2~75
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=478162821dfb4396c53f07ad82dc32cd0f525cea;p=platform%2Fkernel%2Flinux-starfive.git

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>
---

diff --git a/block/ioctl.c b/block/ioctl.c
index ae74d04..06262c2 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -478,15 +478,14 @@ static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
 	if (get_user(n, argp))
 		return -EFAULT;
 
-	if (!(mode & FMODE_EXCL)) {
-		bdgrab(bdev);
-		if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0)
-			return -EBUSY;
-	}
+	if (mode & FMODE_EXCL)
+		return set_blocksize(bdev, n);
 
+	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))
+		return -EBUSY;
 	ret = set_blocksize(bdev, n);
-	if (!(mode & FMODE_EXCL))
-		blkdev_put(bdev, mode | FMODE_EXCL);
+	blkdev_put(bdev, mode | FMODE_EXCL);
+
 	return ret;
 }