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Blackfin arch: add a check to make sure only Blackfin GPIOs may generate IRQs 

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Michael Hennerich 2009-03-28 21:18:45 +08:00 committed by Bryan Wu
parent a66648756f
commit e1312bfcc2
1 changed files with 4 additions and 1 deletions
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5
arch/blackfin/include/asm/gpio.h
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@ -303,7 +303,10 @@ static inline void gpio_set_value(unsigned gpio, int value)
static inline int gpio_to_irq(unsigned gpio) static inline int gpio_to_irq(unsigned gpio)
{ {
return (gpio + GPIO_IRQ_BASE); if (likely(gpio < MAX_BLACKFIN_GPIOS))
return gpio + GPIO_IRQ_BASE;
return -EINVAL;
} }
static inline int irq_to_gpio(unsigned irq) static inline int irq_to_gpio(unsigned irq)