[PATCH 8/9] dev-serial: fix FTDI_GET_MDM_ST response

[Mark Cave-Ayland]

The FTDI_GET_MDM_ST response should only return a single byte indicating the
modem status with bit 0 cleared (as documented in the Linux ftdi_sio.h header
file).

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/usb/dev-serial.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/hw/usb/dev-serial.c b/hw/usb/dev-serial.c
index 4c374d0790..fa734bcf54 100644
--- a/hw/usb/dev-serial.c
+++ b/hw/usb/dev-serial.c
@@ -360,9 +360,8 @@ static void usb_serial_handle_control(USBDevice *dev, 
USBPacket *p,
         /* TODO: TX ON/OFF */
         break;
     case VendorDeviceRequest | FTDI_GET_MDM_ST:
-        data[0] = usb_get_modem_lines(s) | 1;
-        data[1] = FTDI_THRE | FTDI_TEMT;
-        p->actual_length = 2;
+        data[0] = usb_get_modem_lines(s);
+        p->actual_length = 1;
         break;
     case VendorDeviceOutRequest | FTDI_SET_EVENT_CHR:
         /* TODO: handle it */
-- 
2.20.1