From 828240c27ad44dffc53d6d72794057297f58e28e Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 21 Dec 2015 11:03:33 +0100 Subject: [PATCH] gpio: janz-ttl: 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: Ira W. Snyder Signed-off-by: Linus Walleij --- drivers/gpio/gpio-janz-ttl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpio/gpio-janz-ttl.c b/drivers/gpio/gpio-janz-ttl.c index e5f85cab0100..236d322a0b5e 100644 --- a/drivers/gpio/gpio-janz-ttl.c +++ b/drivers/gpio/gpio-janz-ttl.c @@ -76,7 +76,7 @@ static int ttl_get_value(struct gpio_chip *gpio, unsigned offset) spin_lock(&mod->lock); ret = *shadow & (1 << offset); spin_unlock(&mod->lock); - return ret; + return !!ret; } static void ttl_set_value(struct gpio_chip *gpio, unsigned offset, int value) -- 2.11.0