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[PATCH] mt76: mt7921: reset msta->airtime_ac while clearing up hw value

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From: Sean Wang <sean.wang@xxxxxxxxxxxx>

We should reset mstat->airtime_ac along with clear up the entries in the
hardware WLAN table for the Rx and Rx accumulative airtime. Otherwsie, the
value msta->airtime_ac - [tx, rx]_last may be a negative and that is not
the actual airtime the device took in the last run.

Reported-by: YN Chen <YN.Chen@xxxxxxxxxxxx>
Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
---
 drivers/net/wireless/mediatek/mt76/mt7921/mac.c   | 15 ++++++++++-----
 drivers/net/wireless/mediatek/mt76/mt7921/main.c  |  9 +++------
 .../net/wireless/mediatek/mt76/mt7921/mt7921.h    |  2 ++
 3 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index 47f0aa81ab02..87dd0babff7a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -46,6 +46,14 @@ bool mt7921_mac_wtbl_update(struct mt7921_dev *dev, int idx, u32 mask)
 			 0, 5000);
 }
 
+void mt7921_mac_sta_airtime_clear(struct mt7921_dev *dev,
+				  struct mt7921_sta *msta)
+{
+	mt7921_mac_wtbl_update(dev, msta->wcid.idx,
+			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
+	memset(msta->airtime_ac, 0, sizeof(msta->airtime_ac));
+}
+
 void mt7921_mac_sta_poll(struct mt7921_dev *dev)
 {
 	static const u8 ac_to_tid[] = {
@@ -100,11 +108,8 @@ void mt7921_mac_sta_poll(struct mt7921_dev *dev)
 			addr += 8;
 		}
 
-		if (clear) {
-			mt7921_mac_wtbl_update(dev, idx,
-					       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
-			memset(msta->airtime_ac, 0, sizeof(msta->airtime_ac));
-		}
+		if (clear)
+			mt7921_mac_sta_airtime_clear(dev, msta);
 
 		if (!msta->wcid.sta)
 			continue;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index 1438a9f8d1fd..9d70884e24af 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -723,8 +723,7 @@ int mt7921_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 	if (vif->type == NL80211_IFTYPE_STATION)
 		mvif->wep_sta = msta;
 
-	mt7921_mac_wtbl_update(dev, idx,
-			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
+	mt7921_mac_sta_airtime_clear(dev, msta);
 
 	ret = mt7921_mcu_sta_update(dev, sta, vif, true,
 				    MT76_STA_INFO_STATE_NONE);
@@ -750,8 +749,7 @@ void mt7921_mac_sta_assoc(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 		mt76_connac_mcu_uni_add_bss(&dev->mphy, vif, &mvif->sta.wcid,
 					    true);
 
-	mt7921_mac_wtbl_update(dev, msta->wcid.idx,
-			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
+	mt7921_mac_sta_airtime_clear(dev, msta);
 
 	mt7921_mcu_sta_update(dev, sta, vif, true, MT76_STA_INFO_STATE_ASSOC);
 
@@ -769,8 +767,7 @@ void mt7921_mac_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 	mt76_connac_pm_wake(&dev->mphy, &dev->pm);
 
 	mt7921_mcu_sta_update(dev, sta, vif, false, MT76_STA_INFO_STATE_NONE);
-	mt7921_mac_wtbl_update(dev, msta->wcid.idx,
-			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
+	mt7921_mac_sta_airtime_clear(dev, msta);
 
 	if (vif->type == NL80211_IFTYPE_STATION) {
 		struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
index c161031ac62a..8b704d08509d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -362,6 +362,8 @@ void mt7921_stop(struct ieee80211_hw *hw);
 int mt7921_mac_init(struct mt7921_dev *dev);
 bool mt7921_mac_wtbl_update(struct mt7921_dev *dev, int idx, u32 mask);
 void mt7921_mac_reset_counters(struct mt7921_phy *phy);
+void mt7921_mac_sta_airtime_clear(struct mt7921_dev *dev,
+				  struct mt7921_sta *msta);
 void mt7921_mac_set_timing(struct mt7921_phy *phy);
 int mt7921_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 		       struct ieee80211_sta *sta);
-- 
2.25.1




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