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pinctrl: check ops->pin_config_set in pinconf_set_config() 

pinconf_set_config() is called by pinctrl_gpio_set_config().
If a GPIO driver is backed by a pinctrl driver and it does not
support .pin_config_set() hook, it causes NULL pointer dereference.

Fixes: 15381bc7c7 ("pinctrl: Allow configuration of pins from gpiolib based drivers")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Masahiro Yamada 2017-08-04 11:59:32 +09:00 committed by Linus Walleij
parent 75bb10b479
commit 17a512486b
1 changed files with 1 additions and 1 deletions
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2
drivers/pinctrl/pinconf.c
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@ -205,7 +205,7 @@ int pinconf_set_config(struct pinctrl_dev *pctldev, unsigned pin,
const struct pinconf_ops *ops;
ops = pctldev->desc->confops;
if (!ops)
if (!ops || !ops->pin_config_set)
return -ENOTSUPP;
return ops->pin_config_set(pctldev, pin, configs, nconfigs);