wifi: mt76: add def_wcid to struct mt76_wcid

add def_wcid to struct mt76_wcid to allow per-link wcid to retrieve the
struct ieee80211_sta structure.
Co-developed-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Co-developed-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/d5188ca633666eaad7e90a8061d1a0585487e128.1720248331.git.sean.wang@kernel.orgSigned-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -368,6 +368,8 @@ struct mt76_wcid {
 	struct mt76_sta_stats stats;
 
 	struct list_head poll_list;
+
+	struct mt76_wcid *def_wcid;
 };
 
 struct mt76_txq {
@@ -1258,6 +1260,9 @@ wcid_to_sta(struct mt76_wcid *wcid)
 	if (!wcid || !wcid->sta)
 		return NULL;
 
+	if (wcid->def_wcid)
+		ptr = wcid->def_wcid;
+
 	return container_of(ptr, struct ieee80211_sta, drv_priv);
 }
 

drivers/net/wireless/mediatek/mt76/mt7925/main.c

@@ -892,6 +892,7 @@ mt7925_mac_sta_add_links(struct mt792x_dev *dev, struct ieee80211_vif *vif,
 		rcu_assign_pointer(msta->link[link_id], mlink);
 		mlink->sta = msta;
 		mlink->pri_link = &sta->deflink;
+		mlink->wcid.def_wcid = &msta->deflink.wcid;
 
 		link_sta = mt792x_sta_to_link_sta(vif, sta, link_id);
 		mt7925_mac_link_sta_add(&dev->mt76, vif, link_sta);
@@ -1900,6 +1901,7 @@ mt7925_change_vif_links(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		mconf->vif = mvif;
 		mlink->wcid.link_id = link_id;
 		mlink->wcid.link_valid = !!vif->valid_links;
+		mlink->wcid.def_wcid = &mvif->sta.deflink.wcid;
 	}
 
 	if (hweight16(mvif->valid_links) == 0)