--- zzzz-none-000/linux-4.4.271/drivers/bluetooth/hci_qca.c	2021-06-03 06:22:09.000000000 +0000
+++ maple-fsgw-759/linux-4.4.271/drivers/bluetooth/hci_qca.c	2023-12-20 10:37:06.000000000 +0000
@@ -231,11 +231,11 @@
 
 	BT_DBG("hu %p wq awake device", hu);
 
+	spin_lock(&qca->hci_ibs_lock);
+
 	/* Vote for serial clock */
 	serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
 
-	spin_lock(&qca->hci_ibs_lock);
-
 	/* Send wake indication to device */
 	if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
 		BT_ERR("Failed to send WAKE to device");
@@ -260,9 +260,10 @@
 
 	BT_DBG("hu %p wq awake rx", hu);
 
+	spin_lock(&qca->hci_ibs_lock);
+
 	serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
 
-	spin_lock(&qca->hci_ibs_lock);
 	qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
 
 	/* Always acknowledge device wake up,
@@ -287,7 +288,11 @@
 
 	BT_DBG("hu %p rx clock vote off", hu);
 
+	spin_lock(&qca->hci_ibs_lock);
+
 	serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
+
+	spin_unlock(&qca->hci_ibs_lock);
 }
 
 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
@@ -298,6 +303,8 @@
 
 	BT_DBG("hu %p tx clock vote off", hu);
 
+	spin_lock(&qca->hci_ibs_lock);
+
 	/* Run HCI tx handling unlocked */
 	hci_uart_tx_wakeup(hu);
 
@@ -305,6 +312,8 @@
 	 * It is up to the tty driver to pend the clocks off until tx done.
 	 */
 	serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
+
+	spin_unlock(&qca->hci_ibs_lock);
 }
 
 static void hci_ibs_tx_idle_timeout(unsigned long arg)
@@ -520,8 +529,12 @@
 
 	BT_DBG("hu %p qca close", hu);
 
+	spin_lock(&qca->hci_ibs_lock);
+
 	serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
 
+	spin_unlock(&qca->hci_ibs_lock);
+
 	skb_queue_purge(&qca->tx_wait_q);
 	skb_queue_purge(&qca->txq);
 	del_timer(&qca->tx_idle_timer);