From 13e676be085341c1161c3daf535e98ec6d5d6e3c Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 21 Dec 2015 23:03:02 +0100 Subject: [PATCH] fbdev: via-gpio: 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: Florian Tobias Schandinat Acked-by: Tomi Valkeinen Signed-off-by: Linus Walleij --- drivers/video/fbdev/via/via-gpio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/fbdev/via/via-gpio.c b/drivers/video/fbdev/via/via-gpio.c index 6f433b8cee12..3d3544036bc1 100644 --- a/drivers/video/fbdev/via/via-gpio.c +++ b/drivers/video/fbdev/via/via-gpio.c @@ -142,7 +142,7 @@ static int via_gpio_get(struct gpio_chip *chip, unsigned int nr) gpio = cfg->active_gpios[nr]; reg = via_read_reg(VIASR, gpio->vg_port_index); spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags); - return reg & (0x04 << gpio->vg_mask_shift); + return !!(reg & (0x04 << gpio->vg_mask_shift)); }