+static int option_suspend(struct usb_serial *serial, pm_message_t message)
+{
+ dbg("%s entered", __func__);
+ stop_read_write_urbs(serial);
+
+ return 0;
+}
+
+static int option_resume(struct usb_serial *serial)
+{
+ int err, i, j;
+ struct usb_serial_port *port;
+ struct urb *urb;
+ struct option_port_private *portdata;
+
+ dbg("%s entered", __func__);
+ /* get the interrupt URBs resubmitted unconditionally */
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ if (!port->interrupt_in_urb) {
+ dbg("%s: No interrupt URB for port %d\n", __func__, i);
+ continue;
+ }
+ port->interrupt_in_urb->dev = serial->dev;
+ err = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
+ dbg("Submitted interrupt URB for port %d (result %d)", i, err);
+ if (err < 0) {
+ err("%s: Error %d for interrupt URB of port%d",
+ __func__, err, i);
+ return err;
+ }
+ }
+
+ for (i = 0; i < serial->num_ports; i++) {
+ /* walk all ports */
+ port = serial->port[i];
+ portdata = usb_get_serial_port_data(port);
+ mutex_lock(&port->mutex);
+
+ /* skip closed ports */
+ if (!port->port.count) {
+ mutex_unlock(&port->mutex);
+ continue;
+ }
+
+ for (j = 0; j < N_IN_URB; j++) {
+ urb = portdata->in_urbs[j];
+ err = usb_submit_urb(urb, GFP_NOIO);
+ if (err < 0) {
+ mutex_unlock(&port->mutex);
+ err("%s: Error %d for bulk URB %d",
+ __func__, err, i);
+ return err;
+ }
+ }
+ mutex_unlock(&port->mutex);
+ }
+ return 0;
+}
+