wifi: mt76: mt7996: skip deflink accounting for offchannel links

[ Upstream commit 4fe823b ]

Do not take into account offchannel links for deflink accounting.

Fixes: a3316d2 ("wifi: mt76: mt7996: set vif default link_id adding/removing vif links")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Tested-by: Ben Greear <greearb@candelatech.com>
Link: https://patch.msgid.link/20251114-mt76-fix-missing-mtx-v1-4-259ebf11f654@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: LorenzoBianconi

drivers/net/wireless/mediatek/mt76/mt7996/main.c

@@ -370,7 +370,8 @@ int mt7996_vif_link_add(struct mt76_phy *mphy, struct ieee80211_vif *vif,
 
 	ieee80211_iter_keys(mphy->hw, vif, mt7996_key_iter, &it);
 
-	if (mvif->mt76.deflink_id == IEEE80211_LINK_UNSPECIFIED)
+	if (!mlink->wcid->offchannel &&
+	    mvif->mt76.deflink_id == IEEE80211_LINK_UNSPECIFIED)
 		mvif->mt76.deflink_id = link_conf->link_id;
 
 	return 0;
@@ -401,7 +402,8 @@ void mt7996_vif_link_remove(struct mt76_phy *mphy, struct ieee80211_vif *vif,
 
 	rcu_assign_pointer(dev->mt76.wcid[idx], NULL);
 
-	if (mvif->mt76.deflink_id == link_conf->link_id) {
+	if (!mlink->wcid->offchannel &&
+	    mvif->mt76.deflink_id == link_conf->link_id) {
 		struct ieee80211_bss_conf *iter;
 		unsigned int link_id;