[ARM] S3C24XX: GPIO: Fix error returns from gpio functions

Several GPIO functions have been returning -1 to indicate
an error instead of returning a proper error code. Change
to return -EINVAL for invalid argument(s).

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arm/mach-s3c2410/gpio.c b/arch/arm/mach-s3c2410/gpio.c
index bf7fbfe7e4d8..7974afca297c 100644
--- a/arch/arm/mach-s3c2410/gpio.c
+++ b/arch/arm/mach-s3c2410/gpio.c
@@ -40,7 +40,7 @@ int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on,
         unsigned long val;
 
         if (pin < S3C2410_GPG(8) || pin > S3C2410_GPG(15))
-                return -1;
+                return -EINVAL;
 
         config &= 0xff;