From: Linus Walleij Date: Mon, 21 Dec 2015 15:36:17 +0000 (+0100) Subject: gpio: ssbi-mpp: Be sure to clamp return value X-Git-Tag: v4.5-rc1~78^2~145 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b9164f049339006fafe8a52396e0f1997552214a;p=platform%2Fkernel%2Flinux-exynos.git gpio: ssbi-mpp: Be sure to clamp return value As we want gpio_chip .get() calls to be able to return negative error codes and propagate to drivers, we need to go over all drivers and make sure their return values are clamped to [0,1]. We do this by using the ret = !!(val) design pattern. This code was also double-inverting a bool which makes no sense so I removed that code and moved clamping toward the end. Cc: Björn Andersson Signed-off-by: Linus Walleij --- diff --git a/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c b/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c index 8f5c96c..23089d5 100644 --- a/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c +++ b/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c @@ -502,13 +502,13 @@ static int pm8xxx_mpp_get(struct gpio_chip *chip, unsigned offset) int ret; if (!pin->input) - return pin->output_value; + return !!pin->output_value; ret = irq_get_irqchip_state(pin->irq, IRQCHIP_STATE_LINE_LEVEL, &state); if (!ret) - ret = !!state; + ret = state; - return ret; + return !!ret; } static void pm8xxx_mpp_set(struct gpio_chip *chip, unsigned offset, int value)