Re: [PATCH 50/54] mfd: ucb1x00-core: Be sure to clamp return value
From: Lee Jones <hidden>
Date: 2016-01-11 07:43:11
On Tue, 22 Dec 2015, Linus Walleij wrote:
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: Lee Jones <redacted> Signed-off-by: Linus Walleij <redacted> --- Lee: as mentioned in 00/54: either apply this directly or ACK it and I will take it into the GPIO tree. --- drivers/mfd/ucb1x00-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
Applied, thanks.
quoted hunk ↗ jump to hunk
diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c index a6ec7cc0fac6..bcafe1ecd71c 100644 --- a/drivers/mfd/ucb1x00-core.c +++ b/drivers/mfd/ucb1x00-core.c@@ -133,7 +133,7 @@ static int ucb1x00_gpio_get(struct gpio_chip *chip, unsigned offset) val = ucb1x00_reg_read(ucb, UCB_IO_DATA); ucb1x00_disable(ucb); - return val & (1 << offset); + return !!(val & (1 << offset)); } static int ucb1x00_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html