diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index cfcfd5ab06ceb5838f6bdc274e78a30697714d1a..c6aaa6dc75644dff1fc832b9305deec01b83d24f 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1067,6 +1067,8 @@ int usb_serial_suspend(struct usb_interface *intf, pm_message_t message)
 	struct usb_serial_port *port;
 	int i, r = 0;
 
+	serial->suspending = 1;
+
 	for (i = 0; i < serial->num_ports; ++i) {
 		port = serial->port[i];
 		if (port)
@@ -1084,8 +1086,10 @@ int usb_serial_resume(struct usb_interface *intf)
 {
 	struct usb_serial *serial = usb_get_intfdata(intf);
 
+	serial->suspending = 0;
 	if (serial->type->resume)
 		return serial->type->resume(serial);
+
 	return 0;
 }
 EXPORT_SYMBOL(usb_serial_resume);
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 0b8617a9176d3de30ed506cffca9a8aa544d59b0..b95842542590df07a4618af175cef8cdf6a6aa0d 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -130,7 +130,8 @@ struct usb_serial {
 	struct usb_device		*dev;
 	struct usb_serial_driver	*type;
 	struct usb_interface		*interface;
-	unsigned char			disconnected;
+	unsigned char			disconnected:1;
+	unsigned char			suspending:1;
 	unsigned char			minor;
 	unsigned char			num_ports;
 	unsigned char			num_port_pointers;