From f7d623669648d2a8d7e81671294c26e480ddcc79 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 22 Dec 2015 15:47:39 +0100 Subject: [PATCH] mfd: htc-egpio: 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: Philipp Zabel Signed-off-by: Linus Walleij Signed-off-by: Lee Jones --- drivers/mfd/htc-egpio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/htc-egpio.c b/drivers/mfd/htc-egpio.c index 6ccaf90..e4f4a31 100644 --- a/drivers/mfd/htc-egpio.c +++ b/drivers/mfd/htc-egpio.c @@ -163,7 +163,7 @@ static int egpio_get(struct gpio_chip *chip, unsigned offset) value = egpio_readw(ei, reg); pr_debug("readw(%p + %x) = %x\n", ei->base_addr, reg << ei->bus_shift, value); - return value & bit; + return !!(value & bit); } static int egpio_direction_input(struct gpio_chip *chip, unsigned offset) -- 2.7.4