drivers/staging/tty/specialix.c: convert func_enter to func_exit

Convert calls to func_enter on leaving a function to func_exit.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
@@

- func_enter();
+ func_exit();
  return...;
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Roger Wolff <R.E.Wolff@BitWizard.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/staging/tty/specialix.c

@@ -1416,7 +1416,7 @@ static int sx_open(struct tty_struct *tty, struct file *filp)
 				 board, bp, port, SX_PORT(tty->index));
 
 	if (sx_paranoia_check(port, tty->name, "sx_open")) {
-		func_enter();
+		func_exit();
 		return -ENODEV;
 	}
 
@@ -1435,13 +1435,13 @@ static int sx_open(struct tty_struct *tty, struct file *filp)
 
 	error = sx_setup_port(bp, port);
 	if (error) {
-		func_enter();
+		func_exit();
 		return error;
 	}
 
 	error = block_til_ready(tty, filp, port);
 	if (error) {
-		func_enter();
+		func_exit();
 		return error;
 	}
 
@@ -1860,7 +1860,7 @@ static int sx_set_serial_info(struct specialix_port *port,
 	func_enter();
 
 	if (copy_from_user(&tmp, newinfo, sizeof(tmp))) {
-		func_enter();
+		func_exit();
 		return -EFAULT;
 	}