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[34/54] blackfin: gpio: Be sure to clamp return value

Message ID 1450795086-27238-1-git-send-email-linus.walleij@linaro.org
State Accepted
Commit 48295fe932b3306c25ba6157db82f8f9938f2637
Headers show

Commit Message

Linus Walleij Dec. 22, 2015, 2:38 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: Sonic Zhang <sonic.zhang@analog.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: adi-buildroot-devel@lists.sourceforge.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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

-- 
2.4.3

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diff mbox

Patch

diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index a017359c1826..84baa6217c03 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -1159,7 +1159,7 @@  static int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio,
 
 static int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio)
 {
-	return bfin_gpio_get_value(gpio);
+	return !!bfin_gpio_get_value(gpio);
 }
 
 static void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value)