diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index d7b66928a4e5..3c09f743b68c 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -1825,12 +1825,16 @@ static int at91_gpio_probe(struct platform_device *pdev)
 	struct at91_gpio_chip *at91_chip = NULL;
 	struct gpio_chip *chip;
 	struct pinctrl_gpio_range *range;
+	int alias_idx;
 	int ret = 0;
 	int irq, i;
-	int alias_idx = of_alias_get_id(np, "gpio");
 	uint32_t ngpio;
 	char **names;
 
+	alias_idx = of_alias_get_id(np, "gpio");
+	if (alias_idx < 0)
+		return alias_idx;
+
 	BUG_ON(alias_idx >= ARRAY_SIZE(gpio_chips));
 	if (gpio_chips[alias_idx])
 		return dev_err_probe(dev, -EBUSY, "%d slot is occupied.\n", alias_idx);