| Message ID | 1501815572-2792-1-git-send-email-yamada.masahiro@socionext.com |
|---|---|
| State | Accepted |
| Commit | 17a512486bab646109770f6577396810e83acfbb |
| Headers | show |
On Fri, Aug 04, 2017 at 11:59:32AM +0900, Masahiro Yamada wrote: > 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> -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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);
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> --- drivers/pinctrl/pinconf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html