diff --git a/arch/arm/mach-s3c2400/gpio.c b/arch/arm/mach-s3c2400/gpio.c
index 81ebe2f..6c68e78 100644
--- a/arch/arm/mach-s3c2400/gpio.c
+++ b/arch/arm/mach-s3c2400/gpio.c
@@ -33,8 +33,8 @@
 
 int s3c2400_gpio_getirq(unsigned int pin)
 {
-	if (pin < S3C2410_GPE(0) || pin > S3C2400_GPE7_EINT7)
-		return -1;  /* not valid interrupts */
+	if (pin < S3C2410_GPE(0) || pin > S3C2400_GPE(7))
+		return -EINVAL;  /* not valid interrupts */
 
 	return (pin - S3C2410_GPE(0)) + IRQ_EINT0;
 }
diff --git a/arch/arm/mach-s3c2410/gpio.c b/arch/arm/mach-s3c2410/gpio.c
index bf7fbfe..7974afc 100644
--- a/arch/arm/mach-s3c2410/gpio.c
+++ b/arch/arm/mach-s3c2410/gpio.c
@@ -40,7 +40,7 @@
 	unsigned long val;
 
 	if (pin < S3C2410_GPG(8) || pin > S3C2410_GPG(15))
-		return -1;
+		return -EINVAL;
 
 	config &= 0xff;
 
diff --git a/arch/arm/plat-s3c24xx/gpio.c b/arch/arm/plat-s3c24xx/gpio.c
index ae0b9d6..95df059 100644
--- a/arch/arm/plat-s3c24xx/gpio.c
+++ b/arch/arm/plat-s3c24xx/gpio.c
@@ -184,10 +184,10 @@
 int s3c2410_gpio_getirq(unsigned int pin)
 {
 	if (pin < S3C2410_GPF(0) || pin > S3C2410_GPG(15))
-		return -1;	/* not valid interrupts */
+		return -EINVAL;	/* not valid interrupts */
 
 	if (pin < S3C2410_GPG(0) && pin > S3C2410_GPF(7))
-		return -1;	/* not valid pin */
+		return -EINVAL;	/* not valid pin */
 
 	if (pin < S3C2410_GPF(4))
 		return (pin - S3C2410_GPF(0)) + IRQ_EINT0;