[PATCH 1/3] gpio: Verify validity of pin offsets when looking up names

[Samuel Holland]

Translation of a pin name to a device+offset should fail if the offset
is larger than the number of pins in the GPIO bank.

Signed-off-by: Samuel Holland <samuel at sholland.org>
---

 drivers/gpio/gpio-uclass.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 8c77777dbe3..57e87960ee4 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -140,7 +140,8 @@ int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc)
 
 		if (!strncasecmp(name, uc_priv->bank_name, len)) {
 			if (!strict_strtoul(name + len, 10, &offset))
-				break;
+				if (offset < uc_priv->gpio_count)
+					break;
 		}
 
 		/*
-- 
2.31.1