[Bluetooth] Don't do wakeup if protocol is not set

This patch checks whether protocol is set or not, before it will try
to wake us up.

drivers/bluetooth/hci_ldisc.c

@@ -344,7 +344,8 @@ static void hci_uart_tty_wakeup(struct tty_struct *tty)
 	if (tty != hu->tty)
 		return;
 
-	hci_uart_tx_wakeup(hu);
+	if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
+		hci_uart_tx_wakeup(hu);
 }
 
 /* hci_uart_tty_room()

drivers/bluetooth/hci_uart.h

@@ -68,7 +68,7 @@ struct hci_uart {
 };
 
 /* HCI_UART flag bits */
-#define HCI_UART_PROTO_SET		0x00
+#define HCI_UART_PROTO_SET		0
 
 /* TX states  */
 #define HCI_UART_SENDING		1