bcachefs: don't queue btree nodes for rewrites during scan

many nodes found during scan will be old nodes, overwritten by newer
nodes
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/btree_io.c

@@ -1340,7 +1340,9 @@ static void btree_node_read_work(struct work_struct *work)
 			       rb->start_time);
 	bio_put(&rb->bio);
 
-	if (saw_error && !btree_node_read_error(b)) {
+	if (saw_error &&
+	    !btree_node_read_error(b) &&
+	    c->curr_recovery_pass != BCH_RECOVERY_PASS_scan_for_btree_nodes) {
 		printbuf_reset(&buf);
 		bch2_bpos_to_text(&buf, b->key.k.p);
 		bch_err_ratelimited(c, "%s: rewriting btree node at btree=%s level=%u %s due to error",