commit: d79550a7bc35c16476ebdc27c78378d8093390ec From: Dan Carpenter <[email protected]> Date: Thu, 11 Oct 2012 09:56:35 +0300 Subject: gpio-timberdale: fix a potential wrapping issue
->last_ier is an unsigned long but the high bits can't be used int the original code because the shift wraps. Cc: [email protected] Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Linus Walleij <[email protected]> --- drivers/gpio/gpio-timberdale.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpio-timberdale.c b/drivers/gpio/gpio-timberdale.c index 031c6ad..1a3e2b9 100644 --- a/drivers/gpio/gpio-timberdale.c +++ b/drivers/gpio/gpio-timberdale.c @@ -116,7 +116,7 @@ static void timbgpio_irq_disable(struct irq_data *d) unsigned long flags; spin_lock_irqsave(&tgpio->lock, flags); - tgpio->last_ier &= ~(1 << offset); + tgpio->last_ier &= ~(1UL << offset); iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER); spin_unlock_irqrestore(&tgpio->lock, flags); } @@ -128,7 +128,7 @@ static void timbgpio_irq_enable(struct irq_data *d) unsigned long flags; spin_lock_irqsave(&tgpio->lock, flags); - tgpio->last_ier |= 1 << offset; + tgpio->last_ier |= 1UL << offset; iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER); spin_unlock_irqrestore(&tgpio->lock, flags); } -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
