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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 <FlorianSchandinat@gmx.de>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2015-12-21 23:03:02 +01:00
parent 33203f5b94
commit 13e676be08
1 changed files with 1 additions and 1 deletions
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2
drivers/video/fbdev/via/via-gpio.c
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@ -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));
}