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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-08-04 11:59:32 +0900 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-08-14 15:01:59 +0200 |
| commit | 17a512486bab646109770f6577396810e83acfbb (patch) | |
| tree | d7221d679df9c278338266c55a15408b25985860 /drivers/pinctrl | |
| parent | 75bb10b479c33a8e15ab99d6f35a141e86df8547 (diff) | |
| download | linux-stable-17a512486bab646109770f6577396810e83acfbb.tar.gz linux-stable-17a512486bab646109770f6577396810e83acfbb.tar.bz2 linux-stable-17a512486bab646109770f6577396810e83acfbb.zip | |
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: 15381bc7c7f5 ("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>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinconf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinconf.c b/drivers/pinctrl/pinconf.c index 92f363793f35..d3fe14394b73 100644 --- a/drivers/pinctrl/pinconf.c +++ b/drivers/pinctrl/pinconf.c @@ -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); |