From e1312bfcc25f9301f997bf1ce84355a0f1167847 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Sat, 28 Mar 2009 21:18:45 +0800 Subject: [PATCH] Blackfin arch: add a check to make sure only Blackfin GPIOs may generate IRQs Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu --- arch/blackfin/include/asm/gpio.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/blackfin/include/asm/gpio.h b/arch/blackfin/include/asm/gpio.h index d4a082ef75b4..3c99ddc8df16 100644 --- a/arch/blackfin/include/asm/gpio.h +++ b/arch/blackfin/include/asm/gpio.h @@ -303,7 +303,10 @@ static inline void gpio_set_value(unsigned gpio, int value) 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)