diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 5ed2cfa7da1d..3502c4924fdf 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -501,6 +501,7 @@ static int hci_uart_tty_open(struct tty_struct *tty)
 
 	INIT_WORK(&hu->init_ready, hci_uart_init_work);
 	INIT_WORK(&hu->write_work, hci_uart_write_work);
+	spin_lock_init(&hu->rx_lock);
 
 	percpu_init_rwsem(&hu->proto_lock);
 
@@ -610,11 +611,13 @@ static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data,
 	/* It does not need a lock here as it is already protected by a mutex in
 	 * tty caller
 	 */
+	spin_lock(&hu->rx_lock);
 	hu->proto->recv(hu, data, count);
 	percpu_up_read(&hu->proto_lock);
 
 	if (hu->hdev)
 		hu->hdev->stat.byte_rx += count;
+	spin_unlock(&hu->rx_lock);
 
 	tty_unthrottle(tty);
 }