Btrfs: Add check for null block group to find_search_start
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 6a7a9ba..39be6ba 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -204,6 +204,7 @@
wrapped:
cache = btrfs_lookup_block_group(root->fs_info, last);
if (!cache) {
+no_cache:
if (!wrapped) {
wrapped = 1;
last = search_start;
@@ -219,6 +220,8 @@
}
if (!full_scan)
cache = btrfs_find_block_group(root, cache, last, data, 0);
+ if (!cache)
+ goto no_cache;
*cache_ret = cache;
cache_miss = 0;
goto again;