usb_serial_handle_dcd_change
usb_serial_handle_dcd_change(port, tty,
usb_serial_handle_dcd_change(port, tty,
usb_serial_handle_dcd_change(port, tty, msr & UART_MSR_DCD);
usb_serial_handle_dcd_change(port, tty,
EXPORT_SYMBOL_GPL(usb_serial_handle_dcd_change);
usb_serial_handle_dcd_change(port, tty,
void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port,