rio: addition has higher precedence than ?:

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c
index 2e8a6ee..ce81da5 100644
--- a/drivers/char/rio/rio_linux.c
+++ b/drivers/char/rio/rio_linux.c
@@ -333,7 +333,7 @@
 
 int rio_minor(struct tty_struct *tty)
 {
-	return tty->index + (tty->driver == rio_driver) ? 0 : 256;
+	return tty->index + ((tty->driver == rio_driver) ? 0 : 256);
 }
 
 static int rio_set_real_termios(void *ptr)