tiocmget: kill off the passing of the struct file

We don't actually need this and it causes problems for internal use of
this functionality. Currently there is a single use of the FILE * pointer.
That is the serial core which uses it to check tty_hung_up_p. However if
that is true then IO_ERROR is also already set so the check may be removed.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/whiteheat.c

@@ -156,7 +156,7 @@ static int  whiteheat_ioctl(struct tty_struct *tty, struct file *file,
 			unsigned int cmd, unsigned long arg);
 static void whiteheat_set_termios(struct tty_struct *tty,
 			struct usb_serial_port *port, struct ktermios *old);
-static int  whiteheat_tiocmget(struct tty_struct *tty, struct file *file);
+static int  whiteheat_tiocmget(struct tty_struct *tty);
 static int  whiteheat_tiocmset(struct tty_struct *tty, struct file *file,
 			unsigned int set, unsigned int clear);
 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
@@ -833,7 +833,7 @@ static int whiteheat_write_room(struct tty_struct *tty)
 	return (room);
 }
 
-static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file)
+static int whiteheat_tiocmget(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct whiteheat_private *info = usb_get_serial_port_data(port);