Btrfs: close devices on all error paths in open_ctree()

Fix a bug introduced by 7e662854 where we would leave devices busy on
certain error paths in open_ctree().  fs_info is guaranteed to be
non-NULL now so it's safe to dereference it on all error paths.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 91db90b..b6a5c0d 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2460,21 +2460,20 @@ fail_sb_buffer:
        btrfs_stop_workers(&fs_info->caching_workers);
 fail_alloc:
 fail_iput:
+       btrfs_mapping_tree_free(&fs_info->mapping_tree);
+
        invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
        iput(fs_info->btree_inode);
-
-       btrfs_close_devices(fs_info->fs_devices);
-       btrfs_mapping_tree_free(&fs_info->mapping_tree);
 fail_bdi:
        bdi_destroy(&fs_info->bdi);
 fail_srcu:
        cleanup_srcu_struct(&fs_info->subvol_srcu);
 fail:
+       btrfs_close_devices(fs_info->fs_devices);
        free_fs_info(fs_info);
        return ERR_PTR(err);
 
 recovery_tree_root:
-
        if (!btrfs_test_opt(tree_root, RECOVERY))
                goto fail_tree_roots;