@@ -370,7 +370,6 @@ int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info,
dev_replace->cont_reading_from_srcdev_mode = read_src;
WARN_ON(!src_device);
dev_replace->srcdev = src_device;
- WARN_ON(!tgt_device);
dev_replace->tgtdev = tgt_device;
btrfs_info_in_rcu(fs_info,
@@ -2592,6 +2592,12 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
return ret;
}
+/*
+ * Initialize a new device for device replace target from a given source dev
+ * and path.
+ *
+ * Return 0 and new device in @device_out, otherwise return < 0
+ */
int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
const char *device_path,
struct btrfs_device *srcdev,
@@ -2678,7 +2684,7 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
*device_out = device;
- return ret;
+ return 0;
error:
blkdev_put(bdev, FMODE_EXCL);