Btrfs: Handle transid == 0 while opening devices

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

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 501d23d3ebfd2f0c0a23ad4672af2d445a9391a7..3fbf0834e88474d168e59fce51bb3076b55674ab 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -262,7 +262,7 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
                        goto error_brelse;
 
                transid = btrfs_super_generation(disk_super);
-               if (transid > latest_transid) {
+               if (!latest_transid || transid > latest_transid) {
                        latest_devid = devid;
                        latest_transid = transid;
                        latest_bdev = bdev;