USB: suspend support for usb serial

this implements generic support for suspend/resume for usb serial.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 32acbae..e8b8928 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -221,6 +221,9 @@
 	int (*port_probe) (struct usb_serial_port *port);
 	int (*port_remove) (struct usb_serial_port *port);
 
+	int (*suspend) (struct usb_serial *serial, pm_message_t message);
+	int (*resume) (struct usb_serial *serial);
+
 	/* serial function calls */
 	int  (*open)		(struct usb_serial_port *port, struct file * filp);
 	void (*close)		(struct usb_serial_port *port, struct file * filp);
@@ -249,6 +252,9 @@
 extern int usb_serial_probe(struct usb_interface *iface, const struct usb_device_id *id);
 extern void usb_serial_disconnect(struct usb_interface *iface);
 
+extern int usb_serial_suspend(struct usb_interface *intf, pm_message_t message);
+extern int usb_serial_resume(struct usb_interface *intf);
+
 extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
 extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
 
@@ -269,6 +275,7 @@
 extern int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp);
 extern int usb_serial_generic_write (struct usb_serial_port *port, const unsigned char *buf, int count);
 extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp);
+extern int usb_serial_generic_resume (struct usb_serial *serial);
 extern int usb_serial_generic_write_room (struct usb_serial_port *port);
 extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port);
 extern void usb_serial_generic_read_bulk_callback (struct urb *urb);