diff mbox

[32/54] ARM: scoop: Be sure to clamp return value

Message ID 1450794947-27040-1-git-send-email-linus.walleij@linaro.org
State Accepted
Commit 86d5e657d27851beb0e3e7bf48f13263acc5196a
Headers show

Commit Message

Linus Walleij Dec. 22, 2015, 2:35 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: arm@kernel.org
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

---
ARM SoC folks: as mentioned in 00/54: either apply this directly
or ACK it and I will take it into the GPIO tree.
---
 arch/arm/common/scoop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.4.3

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diff mbox

Patch

diff --git a/arch/arm/common/scoop.c b/arch/arm/common/scoop.c
index 45f4c21e393c..e0df333202b8 100644
--- a/arch/arm/common/scoop.c
+++ b/arch/arm/common/scoop.c
@@ -84,7 +84,7 @@  static int scoop_gpio_get(struct gpio_chip *chip, unsigned offset)
 	struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
 
 	/* XXX: I'm unsure, but it seems so */
-	return ioread16(sdev->base + SCOOP_GPRR) & (1 << (offset + 1));
+	return !!(ioread16(sdev->base + SCOOP_GPRR) & (1 << (offset + 1)));
 }
 
 static int scoop_gpio_direction_input(struct gpio_chip *chip,