btrfs: propagate failures of __exclude_logged_extent to upper caller

Function btrfs_exclude_logged_extents may call __exclude_logged_extent
which may fail.
Propagate the failures of __exclude_logged_extent to upper caller.
Signed-off-by: NGu Jinxiang <gujx@cn.fujitsu.com>
Reviewed-by: NNikolay Borisov <nborisov@suse.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/extent-tree.c

@@ -6457,6 +6457,7 @@ int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
 	struct btrfs_key key;
 	int found_type;
 	int i;
+	int ret = 0;
 
 	if (!btrfs_fs_incompat(fs_info, MIXED_GROUPS))
 		return 0;
@@ -6473,10 +6474,12 @@ int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
 			continue;
 		key.objectid = btrfs_file_extent_disk_bytenr(eb, item);
 		key.offset = btrfs_file_extent_disk_num_bytes(eb, item);
-		__exclude_logged_extent(fs_info, key.objectid, key.offset);
+		ret = __exclude_logged_extent(fs_info, key.objectid, key.offset);
+		if (ret)
+			break;
 	}
 
-	return 0;
+	return ret;
 }
 
 static void