hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

MIPS: ar7: 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 <linus.walleij@linaro.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Alban Bedel <albeu@free.fr>
Cc: linux-mips@linux-mips.org
Cc: linux-gpio@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11922/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Linus Walleij 2015-12-22 15:40:27 +01:00 committed by Ralf Baechle
parent 7b42c00a95
commit 249e573d99
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/ar7/gpio.c
View File

@ -37,7 +37,7 @@ static int ar7_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
container_of(chip, struct ar7_gpio_chip, chip);
void __iomem *gpio_in = gpch->regs + AR7_GPIO_INPUT;
return readl(gpio_in) & (1 << gpio);
return !!(readl(gpio_in) & (1 << gpio));
}
static int titan_gpio_get_value(struct gpio_chip *chip, unsigned gpio)