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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>
hifive-unleashed-5.1
Chris Mason 2008-05-08 15:05:58 -04:00
parent a68d5933a0
commit c1c4d91c38
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/volumes.c
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@ -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)) {