| From | Herton Ronaldo Krzesinski <> | Subject | [PATCH 001/241] gpio-timberdale: fix a potential wrapping issue | Date | Thu, 13 Dec 2012 11:56:06 -0200 |
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3.5.7.2 -stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter <dan.carpenter@oracle.com>
commit d79550a7bc35c16476ebdc27c78378d8093390ec upstream.
->last_ier is an unsigned long but the high bits can't be used int the original code because the shift wraps.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> --- drivers/gpio/gpio-timberdale.c | 4 ++-- 1 file 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); } -- 1.7.9.5
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