- if (sw->ml) {
- if (mac_learning_learn(sw->ml, flow->dl_src, 0, flow->in_port,
- GRAT_ARP_LOCK_NONE)) {
+ if (mac_learning_may_learn(sw->ml, flow->dl_src, 0)) {
+ struct mac_entry *mac = mac_learning_insert(sw->ml, flow->dl_src, 0);
+ if (mac_entry_is_new(mac) || mac->port.i != flow->in_port) {