1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 55675b1efb28..e02848c55bd6 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -345,6 +345,9 @@ extern int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port,
 extern int usb_serial_handle_sysrq_char(struct usb_serial_port *port,
                                         unsigned int ch);
 extern int usb_serial_handle_break(struct usb_serial_port *port);
+extern void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port,
+                                         struct tty_struct *tty,
+                                         unsigned int status);
 
 
 extern int usb_serial_bus_register(struct usb_serial_driver *device);