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authorLinus Walleij <linus.walleij@linaro.org>2015-12-21 13:03:33 +0300
committerLinus Walleij <linus.walleij@linaro.org>2015-12-27 00:28:10 +0300
commit828240c27ad44dffc53d6d72794057297f58e28e (patch)
tree415abee2cbbf32b3d0966ab54acda887a90e4521 /drivers/gpio
parent4c628f3de69f66f429c108b27de9f6e82311636c (diff)
downloadlinux-828240c27ad44dffc53d6d72794057297f58e28e.tar.xz
gpio: janz-ttl: 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. Cc: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-janz-ttl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-janz-ttl.c b/drivers/gpio/gpio-janz-ttl.c
index e5f85cab0100..236d322a0b5e 100644
--- a/drivers/gpio/gpio-janz-ttl.c
+++ b/drivers/gpio/gpio-janz-ttl.c
@@ -76,7 +76,7 @@ static int ttl_get_value(struct gpio_chip *gpio, unsigned offset)
spin_lock(&mod->lock);
ret = *shadow & (1 << offset);
spin_unlock(&mod->lock);
- return ret;
+ return !!ret;
}
static void ttl_set_value(struct gpio_chip *gpio, unsigned offset, int value)