bcachefs: fix tiny leak in bch2_dev_add()

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

Author: Kent Overstreet

fs/bcachefs/super.c

@@ -1811,7 +1811,11 @@ int bch2_dev_add(struct bch_fs *c, const char *path)
 		goto err_late;
 
 	up_write(&c->state_lock);
-	return 0;
+out:
+	printbuf_exit(&label);
+	printbuf_exit(&errbuf);
+	bch_err_fn(c, ret);
+	return ret;
 
 err_unlock:
 	mutex_unlock(&c->sb_lock);
@@ -1820,10 +1824,7 @@ int bch2_dev_add(struct bch_fs *c, const char *path)
 	if (ca)
 		bch2_dev_free(ca);
 	bch2_free_super(&sb);
-	printbuf_exit(&label);
-	printbuf_exit(&errbuf);
-	bch_err_fn(c, ret);
-	return ret;
+	goto out;
 err_late:
 	up_write(&c->state_lock);
 	ca = NULL;