From: Bartosz Golaszewski <bartosz.golaszew...@linaro.org>
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 <konrad.dyb...@oss.qualcomm.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszew...@linaro.org>
---
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
7010be8d1ace062fcf7743e539d2065d4aed856b..ad572c923e2ab8caed134207ec02c4107d4dc2bd
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
