From: Alan Cox <alan@lxorguk.ukuu.org.uk>

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


diff -puN drivers/usb/serial/usb-serial.c~usb-serial-handle-null-termios-methods-as-no-hardware-changing-support drivers/usb/serial/usb-serial.c
--- a/drivers/usb/serial/usb-serial.c~usb-serial-handle-null-termios-methods-as-no-hardware-changing-support
+++ a/drivers/usb/serial/usb-serial.c
@@ -429,6 +429,8 @@ static void serial_set_termios (struct t
 	/* pass on to the driver specific version of this function if it is available */
 	if (port->serial->type->set_termios)
 		port->serial->type->set_termios(port, old);
+	else
+		tty_termios_copy_hw(tty->termios, old);
 }
 
 static void serial_break (struct tty_struct *tty, int break_state)
_