From: Chris Mason <chris.mason@oracle.com>
Date: Thu, 8 May 2008 19:05:58 +0000 (-0400)
Subject: Btrfs: Only open block devices once during mount -o subvol=
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c1c4d91c38e6e5b29543b02d4a4fb7f007e44f70;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

Btrfs: Only open block devices once during mount -o subvol=

btrfs_open_devices needed a check to see if the device was already
open.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 55da5f0c56e3..aa001b08ced0 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -196,6 +196,9 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 	mutex_lock(&uuid_mutex);
 	list_for_each(cur, head) {
 		device = list_entry(cur, struct btrfs_device, dev_list);
+		if (device->bdev)
+			continue;
+
 		bdev = open_bdev_excl(device->name, flags, holder);
 
 		if (IS_ERR(bdev)) {