From 5a195c6d4ecf43be26ee1c8be6140025832adfd2 Mon Sep 17 00:00:00 2001 From: Thor Thayer Date: Tue, 25 Oct 2016 11:31:23 -0500 Subject: [PATCH] gpio: gpiolib-devprop: Check chip->parent pointer before dereferencing Confirm the chip->parent is valid before dereferencing because the parent parameter is optional. Signed-off-by: Thor Thayer Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib-devprop.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpio/gpiolib-devprop.c b/drivers/gpio/gpiolib-devprop.c index 17bfc41692ef..27f383bda7d9 100644 --- a/drivers/gpio/gpiolib-devprop.c +++ b/drivers/gpio/gpiolib-devprop.c @@ -31,6 +31,11 @@ void devprop_gpiochip_set_names(struct gpio_chip *chip) const char **names; int ret, i; + if (!chip->parent) { + dev_warn(&gdev->dev, "GPIO chip parent is NULL\n"); + return; + } + ret = device_property_read_string_array(chip->parent, "gpio-line-names", NULL, 0); if (ret < 0)