Blackfin arch: add a check to make sure only Blackfin GPIOs may gener…

…ate IRQs Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
git-mirror · Mar 28, 2009 · e1312bf · e1312bf
1 parent a666487
commit e1312bf
Showing 1 changed file with 4 additions and 1 deletion.
diff --git 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)