Fix btrfs_open_devices to deal with changes since the scan ioctls

Devices can change after the scan ioctls are done, and btrfs_open_devices
needs to be able to verify them as they are opened and used by the FS.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 38b0d9ecda6a..264f297260f8 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1266,10 +1266,10 @@ struct btrfs_root *open_ctree(struct super_block *sb,
 
         btrfs_parse_options(options, tree_root, NULL);
 
-        if (btrfs_super_num_devices(disk_super) > fs_devices->num_devices) {
+        if (btrfs_super_num_devices(disk_super) > fs_devices->open_devices) {
                 printk("Btrfs: wanted %llu devices, but found %llu\n",
                        (unsigned long long)btrfs_super_num_devices(disk_super),
-                       (unsigned long long)fs_devices->num_devices);
+                       (unsigned long long)fs_devices->open_devices);
                 if (btrfs_test_opt(tree_root, DEGRADED))
                         printk("continuing in degraded mode\n");
                 else {