From 0c7f3f92ffe8dc4e631b2f20c06543ec9f521f7c Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 22 Dec 2015 15:48:33 +0100 Subject: [PATCH] mfd: ucb1x00-core: 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. Cc: Lee Jones Signed-off-by: Linus Walleij Signed-off-by: Lee Jones --- drivers/mfd/ucb1x00-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c index f691d7ecad52..e0dd83fb95d3 100644 --- a/drivers/mfd/ucb1x00-core.c +++ b/drivers/mfd/ucb1x00-core.c @@ -133,7 +133,7 @@ static int ucb1x00_gpio_get(struct gpio_chip *chip, unsigned offset) val = ucb1x00_reg_read(ucb, UCB_IO_DATA); ucb1x00_disable(ucb); - return val & (1 << offset); + return !!(val & (1 << offset)); } static int ucb1x00_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -- 2.20.1