diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 88c939f7aad96966011d01d0663be2e409a699e7..e49e29288049a6bcd598e9bbf29067a61281b1f2 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7367,6 +7367,14 @@ static noinline int find_free_extent(struct btrfs_fs_info *fs_info,
 			 */
 			if ((flags & extra) && !(block_group->flags & extra))
 				goto loop;
+
+			/*
+			 * This block group has different flags than we want.
+			 * It's possible that we have MIXED_GROUP flag but no
+			 * block group is mixed.  Just skip such block group.
+			 */
+			btrfs_release_block_group(block_group, delalloc);
+			continue;
 		}
 
 have_block_group: