USB: usb_wwan: kill interrupt urb explicitly at suspend

As the port interrupt URB is submitted by the subdriver at open, we
should also kill it explicitly at suspend (even though this will be
taken care of by USB serial core otherwise).
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/usb_wwan.c

@@ -562,7 +562,7 @@ int usb_wwan_port_remove(struct usb_serial_port *port)
 EXPORT_SYMBOL(usb_wwan_port_remove);
 
 #ifdef CONFIG_PM
-static void stop_read_write_urbs(struct usb_serial *serial)
+static void stop_urbs(struct usb_serial *serial)
 {
 	int i, j;
 	struct usb_serial_port *port;
@@ -578,6 +578,7 @@ static void stop_read_write_urbs(struct usb_serial *serial)
 			usb_kill_urb(portdata->in_urbs[j]);
 		for (j = 0; j < N_OUT_URB; j++)
 			usb_kill_urb(portdata->out_urbs[j]);
+		usb_kill_urb(port->interrupt_in_urb);
 	}
 }
 
@@ -595,7 +596,7 @@ int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message)
 	intfdata->suspended = 1;
 	spin_unlock_irq(&intfdata->susp_lock);
 
-	stop_read_write_urbs(serial);
+	stop_urbs(serial);
 
 	return 0;
 }