mt76: mt7615: reset token when mac_reset happens

[ Upstream commit a6275e9 ]

Reset token in mt7615_mac_reset_work() to avoid possible leakege.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/net/wireless/mediatek/mt76/mt7615/mac.c

@@ -2098,6 +2098,23 @@ void mt7615_dma_reset(struct mt7615_dev *dev)
 }
 EXPORT_SYMBOL_GPL(mt7615_dma_reset);
 
+void mt7615_tx_token_put(struct mt7615_dev *dev)
+{
+	struct mt76_txwi_cache *txwi;
+	int id;
+
+	spin_lock_bh(&dev->token_lock);
+	idr_for_each_entry(&dev->token, txwi, id) {
+		mt7615_txp_skb_unmap(&dev->mt76, txwi);
+		if (txwi->skb)
+			dev_kfree_skb_any(txwi->skb);
+		mt76_put_txwi(&dev->mt76, txwi);
+	}
+	spin_unlock_bh(&dev->token_lock);
+	idr_destroy(&dev->token);
+}
+EXPORT_SYMBOL_GPL(mt7615_tx_token_put);
+
 void mt7615_mac_reset_work(struct work_struct *work)
 {
 	struct mt7615_phy *phy2;
@@ -2141,6 +2158,9 @@ void mt7615_mac_reset_work(struct work_struct *work)
 
 	mt76_wr(dev, MT_MCU_INT_EVENT, MT_MCU_INT_EVENT_PDMA_STOPPED);
 
+	mt7615_tx_token_put(dev);
+	idr_init(&dev->token);
+
 	if (mt7615_wait_reset_state(dev, MT_MCU_CMD_RESET_DONE)) {
 		mt7615_dma_reset(dev);
 

drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h

@@ -619,7 +619,7 @@ int mt7615_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
 			  struct mt76_tx_info *tx_info);
 
 void mt7615_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e);
-
+void mt7615_tx_token_put(struct mt7615_dev *dev);
 void mt7615_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 			 struct sk_buff *skb);
 void mt7615_sta_ps(struct mt76_dev *mdev, struct ieee80211_sta *sta, bool ps);

drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c

@@ -153,9 +153,7 @@ int mt7615_register_device(struct mt7615_dev *dev)
 
 void mt7615_unregister_device(struct mt7615_dev *dev)
 {
-	struct mt76_txwi_cache *txwi;
 	bool mcu_running;
-	int id;
 
 	mcu_running = mt7615_wait_for_mcu_init(dev);
 
@@ -165,15 +163,7 @@ void mt7615_unregister_device(struct mt7615_dev *dev)
 		mt7615_mcu_exit(dev);
 	mt7615_dma_cleanup(dev);
 
-	spin_lock_bh(&dev->token_lock);
-	idr_for_each_entry(&dev->token, txwi, id) {
-		mt7615_txp_skb_unmap(&dev->mt76, txwi);
-		if (txwi->skb)
-			dev_kfree_skb_any(txwi->skb);
-		mt76_put_txwi(&dev->mt76, txwi);
-	}
-	spin_unlock_bh(&dev->token_lock);
-	idr_destroy(&dev->token);
+	mt7615_tx_token_put(dev);
 
 	tasklet_disable(&dev->irq_tasklet);