linux-kernel - [PATCH] gpio: lpc32xx: Fix off-by-one valid range checking for bank

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Message-ID: <1365337700.3916.1.camel@phoenix>
Date:	Sun, 07 Apr 2013 20:28:20 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...aro.org>
Cc:	Kevin Wells <kevin.wells@....com>, linux-kernel@...r.kernel.org
Subject: [PATCH] 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@...ics.com>
---
 drivers/gpio/gpio-lpc32xx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-lpc32xx.c b/drivers/gpio/gpio-lpc32xx.c
index 36d7dee..dda6a75 100644
--- 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;
 
-- 
1.7.10.4



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