Commit 942cde72 authored Sep 03, 2015 by Tony Lindgren Committed by Linus Walleij Sep 14, 2015

pinctrl: core: Warn about NULL gpio_chip in pinctrl_ready_for_gpio_range()



If the gpio driver is confused about the numbers for gpio-ranges,
pinctrl_ready_for_gpio_range() may get called with invalid GPIO
causing a NULL pointer exception. Let's instead provide a warning
that allows fixing the problem and return with error.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

parent 163dc9f3

drivers/pinctrl/core.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -349,6 +349,9 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio)
		struct pinctrl_gpio_range *range = NULL;
		struct gpio_chip *chip = gpio_to_chip(gpio);

		if (WARN(!chip, "no gpio_chip for gpio%i?", gpio))
		return false;

		mutex_lock(&pinctrldev_list_mutex);

		/* Loop over the pin controllers */