diff mbox

[50/54] mfd: ucb1x00-core: Be sure to clamp return value

Message ID 1450795713-28414-1-git-send-email-linus.walleij@linaro.org
State Accepted
Commit 0c7f3f92ffe8dc4e631b2f20c06543ec9f521f7c
Headers show

Commit Message

Linus Walleij Dec. 22, 2015, 2:48 p.m. UTC
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 <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

---
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(-)

-- 
2.4.3

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Comments

Lee Jones Jan. 11, 2016, 7:43 a.m. UTC | #1
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 <lee.jones@linaro.org>

> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

> ---

> 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.

> 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)


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Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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diff mbox

Patch

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)