[PATCH 2/2] pinctrl: Rockchip: abort GPIO probe gracefully on out-of-range alias id

[Ahmad Fatoum]

&{/aliases} { gpio120 = &gpio1; } so far led to an out-of-bounds read
when probing &gpio1. Fix this.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 drivers/pinctrl/pinctrl-rockchip.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index ea748b600419..869cce198239 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -334,6 +334,8 @@ static int rockchip_gpio_probe(struct device_d *dev)
 	int ret, bankno;
 
 	bankno = of_alias_get_id(dev->device_node, "gpio");
+	if (bankno >= ctrl->nr_banks)
+		bankno = -EINVAL;
 	if (bankno < 0)
 		return bankno;
 
-- 
2.30.2