gpio: lpc32xx: Fix off-by-one valid range checking for bank

The valid bank should be 0 ... ARRAY_SIZE(lpc32xx_gpiochip) - 1.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-lpc32xx.c b/drivers/gpio/gpio-lpc32xx.c
index 36d7dee..dda6a75 100644 (file)
--- a/drivers/gpio/gpio-lpc32xx.c
+++ b/drivers/gpio/gpio-lpc32xx.c
@@ -533,7 +533,7 @@ static int lpc32xx_of_xlate(struct gpio_chip *gc,
 {
        /* Is this the correct bank? */
        u32 bank = gpiospec->args[0];
-       if ((bank > ARRAY_SIZE(lpc32xx_gpiochip) ||
+       if ((bank >= ARRAY_SIZE(lpc32xx_gpiochip) ||
            (gc != &lpc32xx_gpiochip[bank].chip)))
                return -EINVAL;