--- drivers/usb/serial/sierra.c

+++ drivers/usb/serial/sierra.c

@@ -195,6 +195,7 @@ static const struct sierra_iface_info di

static struct usb_device_id id_table [] = {

{ USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */

{ USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */

+ { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */

{ USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */

{ USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */

@@ -209,6 +210,7 @@ static struct usb_device_id id_table []

{ USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */

{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */

{ USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */

+ { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */

/* Sierra Wireless C597 */

{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },

/* Sierra Wireless T598 */

@@ -567,14 +569,17 @@ static void sierra_indat_callback(struct

} else {

if (urb->actual_length) {

tty = tty_port_tty_get(&port->port);

-

- tty_buffer_request_room(tty, urb->actual_length);

- tty_insert_flip_string(tty, data, urb->actual_length);

- tty_flip_buffer_push(tty);

-

- tty_kref_put(tty);

- usb_serial_debug_data(debug, &port->dev, __func__,

- urb->actual_length, data);

+ if (tty) {

+ tty_buffer_request_room(tty,

+ urb->actual_length);

+ tty_insert_flip_string(tty, data,

+ urb->actual_length);

+ tty_flip_buffer_push(tty);

+

+ tty_kref_put(tty);

+ usb_serial_debug_data(debug, &port->dev,

+ __func__, urb->actual_length, data);

+ }

} else {

dev_dbg(&port->dev, "%s: empty read urb"

" received\n", __func__);