Message ID | 1450794761-24377-1-git-send-email-linus.walleij@linaro.org |
---|---|
State | New |
Headers | show |
On Tue, Dec 22, 2015 at 10:32 PM, Linus Walleij <linus.walleij@linaro.org> wrote: > 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. > > Cc: Chen-Yu Tsai <wens@csie.org> > Cc: Maxime Ripard <maxime.ripard@free-electrons.com> > Signed-off-by: Linus Walleij <linus.walleij@linaro.org> > --- > drivers/pinctrl/sunxi/pinctrl-sunxi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c > index a437e4f8628b..c53a2dbdb5cf 100644 > --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c > +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c > @@ -469,7 +469,7 @@ static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset) Above 2 lines: val = (readl(pctl->membase + reg) >> index) & DATA_PINS_MASK; Where DATA_PINS_MASK is 0x01. I think we're covered. But if the !! design pattern makes it clearer, Acked-by: Chen-Yu Tsai <wens@csie.org> > if (set_mux) > sunxi_pmx_set(pctl->pctl_dev, offset, SUN4I_FUNC_IRQ); > > - return val; > + return !!val; > } > > static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip, > -- > 2.4.3 > -- 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/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c index a437e4f8628b..c53a2dbdb5cf 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c @@ -469,7 +469,7 @@ static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset) if (set_mux) sunxi_pmx_set(pctl->pctl_dev, offset, SUN4I_FUNC_IRQ); - return val; + return !!val; } static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip,
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. Cc: Chen-Yu Tsai <wens@csie.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- drivers/pinctrl/sunxi/pinctrl-sunxi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)