usb-serial: handle NULL termios methods as "no hardware changing support"

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 4b1bd7def4a5a32243753431ffd526952c017368..426afaa0d9b8b13429b38b358772cdbfdd556c9f 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -429,6 +429,8 @@ static void serial_set_termios (struct tty_struct *tty, struct ktermios * old)
        /* 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)