From: Linus Walleij Date: Tue, 22 Dec 2015 14:41:01 +0000 (+0100) Subject: MIPS: TXx9: Be sure to clamp return value X-Git-Tag: v4.14-rc1~3920^2~36 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6ea6b7faf0fbc7f2bb55277befe478c0a66659fc;p=platform%2Fkernel%2Flinux-rpi.git MIPS: TXx9: 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. Signed-off-by: Linus Walleij Cc: linux-mips@linux-mips.org Cc: linux-gpio@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11923/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/kernel/gpio_txx9.c b/arch/mips/kernel/gpio_txx9.c index c6854d9..705be43c 100644 --- a/arch/mips/kernel/gpio_txx9.c +++ b/arch/mips/kernel/gpio_txx9.c @@ -21,7 +21,7 @@ static struct txx9_pio_reg __iomem *txx9_pioptr; static int txx9_gpio_get(struct gpio_chip *chip, unsigned int offset) { - return __raw_readl(&txx9_pioptr->din) & (1 << offset); + return !!(__raw_readl(&txx9_pioptr->din) & (1 << offset)); } static void txx9_gpio_set_raw(unsigned int offset, int value)