From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Sun, 31 Aug 2025 22:14:37 +0000 (+0200)
Subject: wifi: mt76: mt7996: Use proper link_id in link_sta_rc_update callback
X-Git-Tag: v6.18-rc1~132^2~56^2~27^2~48
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=afff4325548f0cf872e404df2856bf8bd9581c7e;p=thirdparty%2Fkernel%2Fstable.git

wifi: mt76: mt7996: Use proper link_id in link_sta_rc_update callback

Do not always use deflink_id in link_sta_rc_update mac80211
callback but use the proper link_id provided by mac80211.

Fixes: 0762bdd30279f ("wifi: mt76: mt7996: rework mt7996_mac_sta_rc_work to support MLO")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250901-mt7996-fix-link_sta_rc_update-callback-v1-1-e24caf196222@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/main.c b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
index 8a90fee6e8b3c..05d894182676e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
@@ -1669,19 +1669,13 @@ static void mt7996_sta_statistics(struct ieee80211_hw *hw,
 	}
 }
 
-static void mt7996_link_rate_ctrl_update(void *data, struct ieee80211_sta *sta)
+static void mt7996_link_rate_ctrl_update(void *data,
+					 struct mt7996_sta_link *msta_link)
 {
-	struct mt7996_sta *msta = (struct mt7996_sta *)sta->drv_priv;
+	struct mt7996_sta *msta = msta_link->sta;
 	struct mt7996_dev *dev = msta->vif->deflink.phy->dev;
-	struct mt7996_sta_link *msta_link;
 	u32 *changed = data;
 
-	rcu_read_lock();
-
-	msta_link = rcu_dereference(msta->link[msta->deflink_id]);
-	if (!msta_link)
-		goto out;
-
 	spin_lock_bh(&dev->mt76.sta_poll_lock);
 
 	msta_link->changed |= *changed;
@@ -1689,8 +1683,6 @@ static void mt7996_link_rate_ctrl_update(void *data, struct ieee80211_sta *sta)
 		list_add_tail(&msta_link->rc_list, &dev->sta_rc_list);
 
 	spin_unlock_bh(&dev->mt76.sta_poll_lock);
-out:
-	rcu_read_unlock();
 }
 
 static void mt7996_link_sta_rc_update(struct ieee80211_hw *hw,
@@ -1698,11 +1690,32 @@ static void mt7996_link_sta_rc_update(struct ieee80211_hw *hw,
 				      struct ieee80211_link_sta *link_sta,
 				      u32 changed)
 {
-	struct mt7996_dev *dev = mt7996_hw_dev(hw);
 	struct ieee80211_sta *sta = link_sta->sta;
+	struct mt7996_sta *msta = (struct mt7996_sta *)sta->drv_priv;
+	struct mt7996_sta_link *msta_link;
 
-	mt7996_link_rate_ctrl_update(&changed, sta);
-	ieee80211_queue_work(hw, &dev->rc_work);
+	rcu_read_lock();
+
+	msta_link = rcu_dereference(msta->link[link_sta->link_id]);
+	if (msta_link) {
+		struct mt7996_dev *dev = mt7996_hw_dev(hw);
+
+		mt7996_link_rate_ctrl_update(&changed, msta_link);
+		ieee80211_queue_work(hw, &dev->rc_work);
+	}
+
+	rcu_read_unlock();
+}
+
+static void mt7996_sta_rate_ctrl_update(void *data, struct ieee80211_sta *sta)
+{
+	struct mt7996_sta *msta = (struct mt7996_sta *)sta->drv_priv;
+	struct mt7996_sta_link *msta_link;
+	u32 *changed = data;
+
+	msta_link = rcu_dereference(msta->link[msta->deflink_id]);
+	if (msta_link)
+		mt7996_link_rate_ctrl_update(&changed, msta_link);
 }
 
 static int
@@ -1723,7 +1736,7 @@ mt7996_set_bitrate_mask(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 	 * - multiple rates: if it's not in range format i.e 0-{7,8,9} for VHT
 	 * then multiple MCS setting (MCS 4,5,6) is not supported.
 	 */
-	ieee80211_iterate_stations_atomic(hw, mt7996_link_rate_ctrl_update,
+	ieee80211_iterate_stations_atomic(hw, mt7996_sta_rate_ctrl_update,
 					  &changed);
 	ieee80211_queue_work(hw, &dev->rc_work);