1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Handling of a single switch chip, part of a switch fabric
5 * Copyright (c) 2017 Savoir-faire Linux Inc.
6 * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
9 #include <linux/if_bridge.h>
10 #include <linux/netdevice.h>
11 #include <linux/notifier.h>
12 #include <linux/if_vlan.h>
13 #include <net/switchdev.h>
17 static unsigned int dsa_switch_fastest_ageing_time(struct dsa_switch *ds,
18 unsigned int ageing_time)
22 dsa_switch_for_each_port(dp, ds)
23 if (dp->ageing_time && dp->ageing_time < ageing_time)
24 ageing_time = dp->ageing_time;
29 static int dsa_switch_ageing_time(struct dsa_switch *ds,
30 struct dsa_notifier_ageing_time_info *info)
32 unsigned int ageing_time = info->ageing_time;
34 if (ds->ageing_time_min && ageing_time < ds->ageing_time_min)
37 if (ds->ageing_time_max && ageing_time > ds->ageing_time_max)
40 /* Program the fastest ageing time in case of multiple bridges */
41 ageing_time = dsa_switch_fastest_ageing_time(ds, ageing_time);
43 if (ds->ops->set_ageing_time)
44 return ds->ops->set_ageing_time(ds, ageing_time);
49 static bool dsa_port_mtu_match(struct dsa_port *dp,
50 struct dsa_notifier_mtu_info *info)
52 return dp == info->dp || dsa_port_is_dsa(dp) || dsa_port_is_cpu(dp);
55 static int dsa_switch_mtu(struct dsa_switch *ds,
56 struct dsa_notifier_mtu_info *info)
61 if (!ds->ops->port_change_mtu)
64 dsa_switch_for_each_port(dp, ds) {
65 if (dsa_port_mtu_match(dp, info)) {
66 ret = ds->ops->port_change_mtu(ds, dp->index,
76 static int dsa_switch_bridge_join(struct dsa_switch *ds,
77 struct dsa_notifier_bridge_info *info)
81 if (info->dp->ds == ds) {
82 if (!ds->ops->port_bridge_join)
85 err = ds->ops->port_bridge_join(ds, info->dp->index,
87 &info->tx_fwd_offload,
93 if (info->dp->ds != ds && ds->ops->crosschip_bridge_join) {
94 err = ds->ops->crosschip_bridge_join(ds,
95 info->dp->ds->dst->index,
107 static int dsa_switch_bridge_leave(struct dsa_switch *ds,
108 struct dsa_notifier_bridge_info *info)
110 if (info->dp->ds == ds && ds->ops->port_bridge_leave)
111 ds->ops->port_bridge_leave(ds, info->dp->index, info->bridge);
113 if (info->dp->ds != ds && ds->ops->crosschip_bridge_leave)
114 ds->ops->crosschip_bridge_leave(ds, info->dp->ds->dst->index,
122 /* Matches for all upstream-facing ports (the CPU port and all upstream-facing
123 * DSA links) that sit between the targeted port on which the notifier was
124 * emitted and its dedicated CPU port.
126 static bool dsa_port_host_address_match(struct dsa_port *dp,
127 const struct dsa_port *targeted_dp)
129 struct dsa_port *cpu_dp = targeted_dp->cpu_dp;
131 if (dsa_switch_is_upstream_of(dp->ds, targeted_dp->ds))
132 return dp->index == dsa_towards_port(dp->ds, cpu_dp->ds->index,
138 static struct dsa_mac_addr *dsa_mac_addr_find(struct list_head *addr_list,
139 const unsigned char *addr, u16 vid,
142 struct dsa_mac_addr *a;
144 list_for_each_entry(a, addr_list, list)
145 if (ether_addr_equal(a->addr, addr) && a->vid == vid &&
146 dsa_db_equal(&a->db, &db))
152 static int dsa_port_do_mdb_add(struct dsa_port *dp,
153 const struct switchdev_obj_port_mdb *mdb,
156 struct dsa_switch *ds = dp->ds;
157 struct dsa_mac_addr *a;
158 int port = dp->index;
161 /* No need to bother with refcounting for user ports */
162 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
163 return ds->ops->port_mdb_add(ds, port, mdb, db);
165 mutex_lock(&dp->addr_lists_lock);
167 a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid, db);
169 refcount_inc(&a->refcount);
173 a = kzalloc(sizeof(*a), GFP_KERNEL);
179 err = ds->ops->port_mdb_add(ds, port, mdb, db);
185 ether_addr_copy(a->addr, mdb->addr);
188 refcount_set(&a->refcount, 1);
189 list_add_tail(&a->list, &dp->mdbs);
192 mutex_unlock(&dp->addr_lists_lock);
197 static int dsa_port_do_mdb_del(struct dsa_port *dp,
198 const struct switchdev_obj_port_mdb *mdb,
201 struct dsa_switch *ds = dp->ds;
202 struct dsa_mac_addr *a;
203 int port = dp->index;
206 /* No need to bother with refcounting for user ports */
207 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
208 return ds->ops->port_mdb_del(ds, port, mdb, db);
210 mutex_lock(&dp->addr_lists_lock);
212 a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid, db);
218 if (!refcount_dec_and_test(&a->refcount))
221 err = ds->ops->port_mdb_del(ds, port, mdb, db);
223 refcount_set(&a->refcount, 1);
231 mutex_unlock(&dp->addr_lists_lock);
236 static int dsa_port_do_fdb_add(struct dsa_port *dp, const unsigned char *addr,
237 u16 vid, struct dsa_db db)
239 struct dsa_switch *ds = dp->ds;
240 struct dsa_mac_addr *a;
241 int port = dp->index;
244 /* No need to bother with refcounting for user ports */
245 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
246 return ds->ops->port_fdb_add(ds, port, addr, vid, db);
248 mutex_lock(&dp->addr_lists_lock);
250 a = dsa_mac_addr_find(&dp->fdbs, addr, vid, db);
252 refcount_inc(&a->refcount);
256 a = kzalloc(sizeof(*a), GFP_KERNEL);
262 err = ds->ops->port_fdb_add(ds, port, addr, vid, db);
268 ether_addr_copy(a->addr, addr);
271 refcount_set(&a->refcount, 1);
272 list_add_tail(&a->list, &dp->fdbs);
275 mutex_unlock(&dp->addr_lists_lock);
280 static int dsa_port_do_fdb_del(struct dsa_port *dp, const unsigned char *addr,
281 u16 vid, struct dsa_db db)
283 struct dsa_switch *ds = dp->ds;
284 struct dsa_mac_addr *a;
285 int port = dp->index;
288 /* No need to bother with refcounting for user ports */
289 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
290 return ds->ops->port_fdb_del(ds, port, addr, vid, db);
292 mutex_lock(&dp->addr_lists_lock);
294 a = dsa_mac_addr_find(&dp->fdbs, addr, vid, db);
300 if (!refcount_dec_and_test(&a->refcount))
303 err = ds->ops->port_fdb_del(ds, port, addr, vid, db);
305 refcount_set(&a->refcount, 1);
313 mutex_unlock(&dp->addr_lists_lock);
318 static int dsa_switch_do_lag_fdb_add(struct dsa_switch *ds, struct dsa_lag *lag,
319 const unsigned char *addr, u16 vid,
322 struct dsa_mac_addr *a;
325 mutex_lock(&lag->fdb_lock);
327 a = dsa_mac_addr_find(&lag->fdbs, addr, vid, db);
329 refcount_inc(&a->refcount);
333 a = kzalloc(sizeof(*a), GFP_KERNEL);
339 err = ds->ops->lag_fdb_add(ds, *lag, addr, vid, db);
345 ether_addr_copy(a->addr, addr);
348 refcount_set(&a->refcount, 1);
349 list_add_tail(&a->list, &lag->fdbs);
352 mutex_unlock(&lag->fdb_lock);
357 static int dsa_switch_do_lag_fdb_del(struct dsa_switch *ds, struct dsa_lag *lag,
358 const unsigned char *addr, u16 vid,
361 struct dsa_mac_addr *a;
364 mutex_lock(&lag->fdb_lock);
366 a = dsa_mac_addr_find(&lag->fdbs, addr, vid, db);
372 if (!refcount_dec_and_test(&a->refcount))
375 err = ds->ops->lag_fdb_del(ds, *lag, addr, vid, db);
377 refcount_set(&a->refcount, 1);
385 mutex_unlock(&lag->fdb_lock);
390 static int dsa_switch_host_fdb_add(struct dsa_switch *ds,
391 struct dsa_notifier_fdb_info *info)
396 if (!ds->ops->port_fdb_add)
399 dsa_switch_for_each_port(dp, ds) {
400 if (dsa_port_host_address_match(dp, info->dp)) {
401 err = dsa_port_do_fdb_add(dp, info->addr, info->vid,
411 static int dsa_switch_host_fdb_del(struct dsa_switch *ds,
412 struct dsa_notifier_fdb_info *info)
417 if (!ds->ops->port_fdb_del)
420 dsa_switch_for_each_port(dp, ds) {
421 if (dsa_port_host_address_match(dp, info->dp)) {
422 err = dsa_port_do_fdb_del(dp, info->addr, info->vid,
432 static int dsa_switch_fdb_add(struct dsa_switch *ds,
433 struct dsa_notifier_fdb_info *info)
435 int port = dsa_towards_port(ds, info->dp->ds->index, info->dp->index);
436 struct dsa_port *dp = dsa_to_port(ds, port);
438 if (!ds->ops->port_fdb_add)
441 return dsa_port_do_fdb_add(dp, info->addr, info->vid, info->db);
444 static int dsa_switch_fdb_del(struct dsa_switch *ds,
445 struct dsa_notifier_fdb_info *info)
447 int port = dsa_towards_port(ds, info->dp->ds->index, info->dp->index);
448 struct dsa_port *dp = dsa_to_port(ds, port);
450 if (!ds->ops->port_fdb_del)
453 return dsa_port_do_fdb_del(dp, info->addr, info->vid, info->db);
456 static int dsa_switch_lag_fdb_add(struct dsa_switch *ds,
457 struct dsa_notifier_lag_fdb_info *info)
461 if (!ds->ops->lag_fdb_add)
464 /* Notify switch only if it has a port in this LAG */
465 dsa_switch_for_each_port(dp, ds)
466 if (dsa_port_offloads_lag(dp, info->lag))
467 return dsa_switch_do_lag_fdb_add(ds, info->lag,
468 info->addr, info->vid,
474 static int dsa_switch_lag_fdb_del(struct dsa_switch *ds,
475 struct dsa_notifier_lag_fdb_info *info)
479 if (!ds->ops->lag_fdb_del)
482 /* Notify switch only if it has a port in this LAG */
483 dsa_switch_for_each_port(dp, ds)
484 if (dsa_port_offloads_lag(dp, info->lag))
485 return dsa_switch_do_lag_fdb_del(ds, info->lag,
486 info->addr, info->vid,
492 static int dsa_switch_lag_change(struct dsa_switch *ds,
493 struct dsa_notifier_lag_info *info)
495 if (info->dp->ds == ds && ds->ops->port_lag_change)
496 return ds->ops->port_lag_change(ds, info->dp->index);
498 if (info->dp->ds != ds && ds->ops->crosschip_lag_change)
499 return ds->ops->crosschip_lag_change(ds, info->dp->ds->index,
505 static int dsa_switch_lag_join(struct dsa_switch *ds,
506 struct dsa_notifier_lag_info *info)
508 if (info->dp->ds == ds && ds->ops->port_lag_join)
509 return ds->ops->port_lag_join(ds, info->dp->index, info->lag,
512 if (info->dp->ds != ds && ds->ops->crosschip_lag_join)
513 return ds->ops->crosschip_lag_join(ds, info->dp->ds->index,
514 info->dp->index, info->lag,
520 static int dsa_switch_lag_leave(struct dsa_switch *ds,
521 struct dsa_notifier_lag_info *info)
523 if (info->dp->ds == ds && ds->ops->port_lag_leave)
524 return ds->ops->port_lag_leave(ds, info->dp->index, info->lag);
526 if (info->dp->ds != ds && ds->ops->crosschip_lag_leave)
527 return ds->ops->crosschip_lag_leave(ds, info->dp->ds->index,
528 info->dp->index, info->lag);
533 static int dsa_switch_mdb_add(struct dsa_switch *ds,
534 struct dsa_notifier_mdb_info *info)
536 int port = dsa_towards_port(ds, info->dp->ds->index, info->dp->index);
537 struct dsa_port *dp = dsa_to_port(ds, port);
539 if (!ds->ops->port_mdb_add)
542 return dsa_port_do_mdb_add(dp, info->mdb, info->db);
545 static int dsa_switch_mdb_del(struct dsa_switch *ds,
546 struct dsa_notifier_mdb_info *info)
548 int port = dsa_towards_port(ds, info->dp->ds->index, info->dp->index);
549 struct dsa_port *dp = dsa_to_port(ds, port);
551 if (!ds->ops->port_mdb_del)
554 return dsa_port_do_mdb_del(dp, info->mdb, info->db);
557 static int dsa_switch_host_mdb_add(struct dsa_switch *ds,
558 struct dsa_notifier_mdb_info *info)
563 if (!ds->ops->port_mdb_add)
566 dsa_switch_for_each_port(dp, ds) {
567 if (dsa_port_host_address_match(dp, info->dp)) {
568 err = dsa_port_do_mdb_add(dp, info->mdb, info->db);
577 static int dsa_switch_host_mdb_del(struct dsa_switch *ds,
578 struct dsa_notifier_mdb_info *info)
583 if (!ds->ops->port_mdb_del)
586 dsa_switch_for_each_port(dp, ds) {
587 if (dsa_port_host_address_match(dp, info->dp)) {
588 err = dsa_port_do_mdb_del(dp, info->mdb, info->db);
597 /* Port VLANs match on the targeted port and on all DSA ports */
598 static bool dsa_port_vlan_match(struct dsa_port *dp,
599 struct dsa_notifier_vlan_info *info)
601 return dsa_port_is_dsa(dp) || dp == info->dp;
604 /* Host VLANs match on the targeted port's CPU port, and on all DSA ports
605 * (upstream and downstream) of that switch and its upstream switches.
607 static bool dsa_port_host_vlan_match(struct dsa_port *dp,
608 const struct dsa_port *targeted_dp)
610 struct dsa_port *cpu_dp = targeted_dp->cpu_dp;
612 if (dsa_switch_is_upstream_of(dp->ds, targeted_dp->ds))
613 return dsa_port_is_dsa(dp) || dp == cpu_dp;
618 static struct dsa_vlan *dsa_vlan_find(struct list_head *vlan_list,
619 const struct switchdev_obj_port_vlan *vlan)
623 list_for_each_entry(v, vlan_list, list)
624 if (v->vid == vlan->vid)
630 static int dsa_port_do_vlan_add(struct dsa_port *dp,
631 const struct switchdev_obj_port_vlan *vlan,
632 struct netlink_ext_ack *extack)
634 struct dsa_switch *ds = dp->ds;
635 int port = dp->index;
639 /* No need to bother with refcounting for user ports. */
640 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
641 return ds->ops->port_vlan_add(ds, port, vlan, extack);
643 /* No need to propagate on shared ports the existing VLANs that were
644 * re-notified after just the flags have changed. This would cause a
645 * refcount bump which we need to avoid, since it unbalances the
646 * additions with the deletions.
651 mutex_lock(&dp->vlans_lock);
653 v = dsa_vlan_find(&dp->vlans, vlan);
655 refcount_inc(&v->refcount);
659 v = kzalloc(sizeof(*v), GFP_KERNEL);
665 err = ds->ops->port_vlan_add(ds, port, vlan, extack);
672 refcount_set(&v->refcount, 1);
673 list_add_tail(&v->list, &dp->vlans);
676 mutex_unlock(&dp->vlans_lock);
681 static int dsa_port_do_vlan_del(struct dsa_port *dp,
682 const struct switchdev_obj_port_vlan *vlan)
684 struct dsa_switch *ds = dp->ds;
685 int port = dp->index;
689 /* No need to bother with refcounting for user ports */
690 if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
691 return ds->ops->port_vlan_del(ds, port, vlan);
693 mutex_lock(&dp->vlans_lock);
695 v = dsa_vlan_find(&dp->vlans, vlan);
701 if (!refcount_dec_and_test(&v->refcount))
704 err = ds->ops->port_vlan_del(ds, port, vlan);
706 refcount_set(&v->refcount, 1);
714 mutex_unlock(&dp->vlans_lock);
719 static int dsa_switch_vlan_add(struct dsa_switch *ds,
720 struct dsa_notifier_vlan_info *info)
725 if (!ds->ops->port_vlan_add)
728 dsa_switch_for_each_port(dp, ds) {
729 if (dsa_port_vlan_match(dp, info)) {
730 err = dsa_port_do_vlan_add(dp, info->vlan,
740 static int dsa_switch_vlan_del(struct dsa_switch *ds,
741 struct dsa_notifier_vlan_info *info)
746 if (!ds->ops->port_vlan_del)
749 dsa_switch_for_each_port(dp, ds) {
750 if (dsa_port_vlan_match(dp, info)) {
751 err = dsa_port_do_vlan_del(dp, info->vlan);
760 static int dsa_switch_host_vlan_add(struct dsa_switch *ds,
761 struct dsa_notifier_vlan_info *info)
766 if (!ds->ops->port_vlan_add)
769 dsa_switch_for_each_port(dp, ds) {
770 if (dsa_port_host_vlan_match(dp, info->dp)) {
771 err = dsa_port_do_vlan_add(dp, info->vlan,
781 static int dsa_switch_host_vlan_del(struct dsa_switch *ds,
782 struct dsa_notifier_vlan_info *info)
787 if (!ds->ops->port_vlan_del)
790 dsa_switch_for_each_port(dp, ds) {
791 if (dsa_port_host_vlan_match(dp, info->dp)) {
792 err = dsa_port_do_vlan_del(dp, info->vlan);
801 static int dsa_switch_change_tag_proto(struct dsa_switch *ds,
802 struct dsa_notifier_tag_proto_info *info)
804 const struct dsa_device_ops *tag_ops = info->tag_ops;
805 struct dsa_port *dp, *cpu_dp;
808 if (!ds->ops->change_tag_protocol)
813 err = ds->ops->change_tag_protocol(ds, tag_ops->proto);
817 dsa_switch_for_each_cpu_port(cpu_dp, ds)
818 dsa_port_set_tag_protocol(cpu_dp, tag_ops);
820 /* Now that changing the tag protocol can no longer fail, let's update
821 * the remaining bits which are "duplicated for faster access", and the
822 * bits that depend on the tagger, such as the MTU.
824 dsa_switch_for_each_user_port(dp, ds) {
825 struct net_device *slave = dp->slave;
827 dsa_slave_setup_tagger(slave);
829 /* rtnl_mutex is held in dsa_tree_change_tag_proto */
830 dsa_slave_change_mtu(slave, slave->mtu);
836 /* We use the same cross-chip notifiers to inform both the tagger side, as well
837 * as the switch side, of connection and disconnection events.
838 * Since ds->tagger_data is owned by the tagger, it isn't a hard error if the
839 * switch side doesn't support connecting to this tagger, and therefore, the
840 * fact that we don't disconnect the tagger side doesn't constitute a memory
841 * leak: the tagger will still operate with persistent per-switch memory, just
842 * with the switch side unconnected to it. What does constitute a hard error is
843 * when the switch side supports connecting but fails.
846 dsa_switch_connect_tag_proto(struct dsa_switch *ds,
847 struct dsa_notifier_tag_proto_info *info)
849 const struct dsa_device_ops *tag_ops = info->tag_ops;
852 /* Notify the new tagger about the connection to this switch */
853 if (tag_ops->connect) {
854 err = tag_ops->connect(ds);
859 if (!ds->ops->connect_tag_protocol)
862 /* Notify the switch about the connection to the new tagger */
863 err = ds->ops->connect_tag_protocol(ds, tag_ops->proto);
865 /* Revert the new tagger's connection to this tree */
866 if (tag_ops->disconnect)
867 tag_ops->disconnect(ds);
875 dsa_switch_disconnect_tag_proto(struct dsa_switch *ds,
876 struct dsa_notifier_tag_proto_info *info)
878 const struct dsa_device_ops *tag_ops = info->tag_ops;
880 /* Notify the tagger about the disconnection from this switch */
881 if (tag_ops->disconnect && ds->tagger_data)
882 tag_ops->disconnect(ds);
884 /* No need to notify the switch, since it shouldn't have any
885 * resources to tear down
891 dsa_switch_master_state_change(struct dsa_switch *ds,
892 struct dsa_notifier_master_state_info *info)
894 if (!ds->ops->master_state_change)
897 ds->ops->master_state_change(ds, info->master, info->operational);
902 static int dsa_switch_event(struct notifier_block *nb,
903 unsigned long event, void *info)
905 struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb);
909 case DSA_NOTIFIER_AGEING_TIME:
910 err = dsa_switch_ageing_time(ds, info);
912 case DSA_NOTIFIER_BRIDGE_JOIN:
913 err = dsa_switch_bridge_join(ds, info);
915 case DSA_NOTIFIER_BRIDGE_LEAVE:
916 err = dsa_switch_bridge_leave(ds, info);
918 case DSA_NOTIFIER_FDB_ADD:
919 err = dsa_switch_fdb_add(ds, info);
921 case DSA_NOTIFIER_FDB_DEL:
922 err = dsa_switch_fdb_del(ds, info);
924 case DSA_NOTIFIER_HOST_FDB_ADD:
925 err = dsa_switch_host_fdb_add(ds, info);
927 case DSA_NOTIFIER_HOST_FDB_DEL:
928 err = dsa_switch_host_fdb_del(ds, info);
930 case DSA_NOTIFIER_LAG_FDB_ADD:
931 err = dsa_switch_lag_fdb_add(ds, info);
933 case DSA_NOTIFIER_LAG_FDB_DEL:
934 err = dsa_switch_lag_fdb_del(ds, info);
936 case DSA_NOTIFIER_LAG_CHANGE:
937 err = dsa_switch_lag_change(ds, info);
939 case DSA_NOTIFIER_LAG_JOIN:
940 err = dsa_switch_lag_join(ds, info);
942 case DSA_NOTIFIER_LAG_LEAVE:
943 err = dsa_switch_lag_leave(ds, info);
945 case DSA_NOTIFIER_MDB_ADD:
946 err = dsa_switch_mdb_add(ds, info);
948 case DSA_NOTIFIER_MDB_DEL:
949 err = dsa_switch_mdb_del(ds, info);
951 case DSA_NOTIFIER_HOST_MDB_ADD:
952 err = dsa_switch_host_mdb_add(ds, info);
954 case DSA_NOTIFIER_HOST_MDB_DEL:
955 err = dsa_switch_host_mdb_del(ds, info);
957 case DSA_NOTIFIER_VLAN_ADD:
958 err = dsa_switch_vlan_add(ds, info);
960 case DSA_NOTIFIER_VLAN_DEL:
961 err = dsa_switch_vlan_del(ds, info);
963 case DSA_NOTIFIER_HOST_VLAN_ADD:
964 err = dsa_switch_host_vlan_add(ds, info);
966 case DSA_NOTIFIER_HOST_VLAN_DEL:
967 err = dsa_switch_host_vlan_del(ds, info);
969 case DSA_NOTIFIER_MTU:
970 err = dsa_switch_mtu(ds, info);
972 case DSA_NOTIFIER_TAG_PROTO:
973 err = dsa_switch_change_tag_proto(ds, info);
975 case DSA_NOTIFIER_TAG_PROTO_CONNECT:
976 err = dsa_switch_connect_tag_proto(ds, info);
978 case DSA_NOTIFIER_TAG_PROTO_DISCONNECT:
979 err = dsa_switch_disconnect_tag_proto(ds, info);
981 case DSA_NOTIFIER_TAG_8021Q_VLAN_ADD:
982 err = dsa_switch_tag_8021q_vlan_add(ds, info);
984 case DSA_NOTIFIER_TAG_8021Q_VLAN_DEL:
985 err = dsa_switch_tag_8021q_vlan_del(ds, info);
987 case DSA_NOTIFIER_MASTER_STATE_CHANGE:
988 err = dsa_switch_master_state_change(ds, info);
996 dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n",
999 return notifier_from_errno(err);
1002 int dsa_switch_register_notifier(struct dsa_switch *ds)
1004 ds->nb.notifier_call = dsa_switch_event;
1006 return raw_notifier_chain_register(&ds->dst->nh, &ds->nb);
1009 void dsa_switch_unregister_notifier(struct dsa_switch *ds)
1013 err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb);
1015 dev_err(ds->dev, "failed to unregister notifier (%d)\n", err);