1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index b9b0f7b4e43b..302ddf55d2da 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -268,6 +268,8 @@ struct usb_serial_driver {
                         struct usb_serial_port *port, struct ktermios *old);
         void (*break_ctl)(struct tty_struct *tty, int break_state);
         int  (*chars_in_buffer)(struct tty_struct *tty);
+        void (*wait_until_sent)(struct tty_struct *tty, long timeout);
+        bool (*tx_empty)(struct usb_serial_port *port);
         void (*throttle)(struct tty_struct *tty);
         void (*unthrottle)(struct tty_struct *tty);
         int  (*tiocmget)(struct tty_struct *tty);
@@ -327,6 +329,8 @@ extern void usb_serial_generic_close(struct usb_serial_port *port);
 extern int usb_serial_generic_resume(struct usb_serial *serial);
 extern int usb_serial_generic_write_room(struct tty_struct *tty);
 extern int usb_serial_generic_chars_in_buffer(struct tty_struct *tty);
+extern void usb_serial_generic_wait_until_sent(struct tty_struct *tty,
+                                                                long timeout);
 extern void usb_serial_generic_read_bulk_callback(struct urb *urb);
 extern void usb_serial_generic_write_bulk_callback(struct urb *urb);
 extern void usb_serial_generic_throttle(struct tty_struct *tty);