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gpio: gpiolib-devprop: Check chip->parent pointer before dereferencing

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Confirm the chip->parent is valid before dereferencing because
the parent parameter is optional.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Thor Thayer 2016-10-25 11:31:23 -05:00 committed by Linus Walleij
parent f85522c207
commit 5a195c6d4e
1 changed files with 5 additions and 0 deletions
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5
drivers/gpio/gpiolib-devprop.c
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@ -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)