[PATCH] gpio: Check if base is positive before calling gpio_is_valid()

[Geert Uytterhoeven <geert+renesas@xxxxxxxxx>]

It doesn't make much sense to make some (possible expensive) calls to
gpio_is_valid() first, and to ignore the result if the base number is
negative. Check for a positive base number first.

Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
 drivers/gpio/gpiolib.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 2e3d66adc6880950..bdf2020e103c7bc0 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -227,8 +227,8 @@ int gpiochip_add(struct gpio_chip *chip)
 	unsigned	id;
 	int		base = chip->base;
 
-	if ((!gpio_is_valid(base) || !gpio_is_valid(base + chip->ngpio - 1))
-			&& base >= 0) {
+	if (base >= 0 &&
+	    (!gpio_is_valid(base) || !gpio_is_valid(base + chip->ngpio - 1))) {
 		status = -EINVAL;
 		goto fail;
 	}
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-gpio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html