From: Bartosz Golaszewski The strict flag in struct pinmux_ops disallows the usage of the same pin as a GPIO and for another function. Without it, a rouge user-space process with enough privileges (or even a buggy driver) can request a used pin as GPIO and drive it, potentially confusing devices or even crashing the system. Set it globally for all pinctrl-msm users. Reviewed-by: Konrad Dybcio Signed-off-by: Bartosz Golaszewski --- drivers/pinctrl/qcom/pinctrl-msm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c index a5f69464827119dfe2a7781b558094b283fca215..1751d838ce95d6138c824b90098f74891dec7656 100644 --- a/drivers/pinctrl/qcom/pinctrl-msm.c +++ b/drivers/pinctrl/qcom/pinctrl-msm.c @@ -268,6 +268,7 @@ static const struct pinmux_ops msm_pinmux_ops = { .function_is_gpio = pinmux_generic_function_is_gpio, .gpio_request_enable = msm_pinmux_request_gpio, .set_mux = msm_pinmux_set_mux, + .strict = true, }; static int msm_config_reg(struct msm_pinctrl *pctrl, -- 2.48.1