Btrfs: Extra NULL block group checks in find_free_extent

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

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 187be40..7c953b2 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1319,6 +1319,12 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
        total_needed += empty_size;
        path = btrfs_alloc_path();
 check_failed:
+       if (!block_group) {
+               block_group = btrfs_lookup_block_group(info, search_start);
+               if (!block_group)
+                       block_group = btrfs_lookup_block_group(info,
+                                                      orig_search_start);
+       }
        search_start = find_search_start(root, &block_group, search_start,
                                         total_needed, data, full_scan);
        search_start = stripe_align(root, search_start);