wifi: mac80211: mlme: switch some things back to deflink

With MLO, when we'll disconnect from an AP MLD, we'll just
destroy all the links. Therefore, the only thing we (may)
need to reset is the deflink data, so switch back to that
and adjust the comments accordingly.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/mlme.c

@@ -2438,7 +2438,6 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 {
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
 	struct ieee80211_link_data *link = &sdata->deflink;
 	u32 changed = 0;
 	struct ieee80211_prep_tx_info info = {
@@ -2456,7 +2455,10 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	ieee80211_stop_poll(sdata);
 
 	ifmgd->associated = false;
-	link->u.mgd.bss = NULL;
+
+	/* other links will be destroyed */
+	sdata->deflink.u.mgd.bss = NULL;
+
 	netif_carrier_off(sdata->dev);
 
 	/*
@@ -2494,7 +2496,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 		 * driver requested so.
 		 */
 		if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) &&
-		    !link->u.mgd.have_beacon) {
+		    !sdata->deflink.u.mgd.have_beacon) {
 			drv_mgd_prepare_tx(sdata->local, sdata, &info);
 		}
 
@@ -2525,9 +2527,9 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	changed |= BSS_CHANGED_ASSOC;
 	sdata->vif.cfg.assoc = false;
 
-	link->u.mgd.p2p_noa_index = -1;
-	memset(&link->conf->p2p_noa_attr, 0,
-	       sizeof(link->conf->p2p_noa_attr));
+	sdata->deflink.u.mgd.p2p_noa_index = -1;
+	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
+	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
 
 	/* on the next assoc, re-program HT/VHT parameters */
 	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
@@ -2535,15 +2537,19 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
 	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
 
-	/* reset MU-MIMO ownership and group data */
-	memset(link->conf->mu_group.membership, 0,
-	       sizeof(link->conf->mu_group.membership));
-	memset(link->conf->mu_group.position, 0,
-	       sizeof(link->conf->mu_group.position));
-	changed |= BSS_CHANGED_MU_GROUPS;
-	link->conf->mu_mimo_owner = false;
+	/*
+	 * reset MU-MIMO ownership and group data in default link,
+	 * if used, other links are destroyed
+	 */
+	memset(sdata->vif.bss_conf.mu_group.membership, 0,
+	       sizeof(sdata->vif.bss_conf.mu_group.membership));
+	memset(sdata->vif.bss_conf.mu_group.position, 0,
+	       sizeof(sdata->vif.bss_conf.mu_group.position));
+	if (!sdata->vif.valid_links)
+		changed |= BSS_CHANGED_MU_GROUPS;
+	sdata->vif.bss_conf.mu_mimo_owner = false;
 
-	link->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
+	sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
 
 	del_timer_sync(&local->dynamic_ps_timer);
 	cancel_work_sync(&local->dynamic_ps_enable_work);
@@ -2552,7 +2558,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	if (sdata->vif.cfg.arp_addr_cnt)
 		changed |= BSS_CHANGED_ARP_FILTER;
 
-	link->conf->qos = false;
+	sdata->vif.bss_conf.qos = false;
 	changed |= BSS_CHANGED_QOS;
 
 	/* The BSSID (not really interesting) and HT changed */
@@ -2565,27 +2571,27 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	del_timer_sync(&sdata->u.mgd.conn_mon_timer);
 	del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
 	del_timer_sync(&sdata->u.mgd.timer);
-	del_timer_sync(&link->u.mgd.chswitch_timer);
+	del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer);
 
-	link->conf->dtim_period = 0;
-	link->conf->beacon_rate = NULL;
+	sdata->vif.bss_conf.dtim_period = 0;
+	sdata->vif.bss_conf.beacon_rate = NULL;
 
-	link->u.mgd.have_beacon = false;
-	link->u.mgd.tracking_signal_avg = false;
-	link->u.mgd.disable_wmm_tracking = false;
+	sdata->deflink.u.mgd.have_beacon = false;
+	sdata->deflink.u.mgd.tracking_signal_avg = false;
+	sdata->deflink.u.mgd.disable_wmm_tracking = false;
 
 	ifmgd->flags = 0;
-	link->u.mgd.conn_flags = 0;
+	sdata->deflink.u.mgd.conn_flags = 0;
 	mutex_lock(&local->mtx);
 	ieee80211_link_release_channel(link);
 
-	link->conf->csa_active = false;
-	link->u.mgd.csa_waiting_bcn = false;
-	link->u.mgd.csa_ignored_same_chan = false;
-	if (link->csa_block_tx) {
+	sdata->vif.bss_conf.csa_active = false;
+	sdata->deflink.u.mgd.csa_waiting_bcn = false;
+	sdata->deflink.u.mgd.csa_ignored_same_chan = false;
+	if (sdata->deflink.csa_block_tx) {
 		ieee80211_wake_vif_queues(local, sdata,
 					  IEEE80211_QUEUE_STOP_REASON_CSA);
-		link->csa_block_tx = false;
+		sdata->deflink.csa_block_tx = false;
 	}
 	mutex_unlock(&local->mtx);
 
@@ -2593,9 +2599,10 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
 	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
 
-	bss_conf->pwr_reduction = 0;
-	bss_conf->tx_pwr_env_num = 0;
-	memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env));
+	sdata->vif.bss_conf.pwr_reduction = 0;
+	sdata->vif.bss_conf.tx_pwr_env_num = 0;
+	memset(sdata->vif.bss_conf.tx_pwr_env, 0,
+	       sizeof(sdata->vif.bss_conf.tx_pwr_env));
 }
 
 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
@@ -2912,6 +2919,7 @@ static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
 					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
 			       tx, frame_buf);
 	mutex_lock(&local->mtx);
+	/* the other links will be destroyed */
 	sdata->vif.bss_conf.csa_active = false;
 	sdata->deflink.u.mgd.csa_waiting_bcn = false;
 	if (sdata->deflink.csa_block_tx) {
@@ -3058,7 +3066,6 @@ static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
 		del_timer_sync(&sdata->u.mgd.timer);
 		sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
 
-		/* FIXME: other links are destroyed? */
 		sdata->deflink.u.mgd.conn_flags = 0;
 		eth_zero_addr(sdata->deflink.u.mgd.bssid);
 		ieee80211_link_info_change_notify(sdata, &sdata->deflink,
@@ -6408,7 +6415,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 
 	return 0;
  err_clear:
-	eth_zero_addr(link->u.mgd.bssid);
+	eth_zero_addr(sdata->deflink.u.mgd.bssid);
 	ieee80211_link_info_change_notify(sdata, &sdata->deflink,
 					  BSS_CHANGED_BSSID);
 	ifmgd->assoc_data = NULL;