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| author | Linus Walleij <linus.walleij@linaro.org> | 2015-12-21 11:03:33 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-12-26 22:28:10 +0100 |
| commit | 828240c27ad44dffc53d6d72794057297f58e28e (patch) | |
| tree | 415abee2cbbf32b3d0966ab54acda887a90e4521 | |
| parent | 4c628f3de69f66f429c108b27de9f6e82311636c (diff) | |
| download | linux-828240c27ad44dffc53d6d72794057297f58e28e.tar.bz2 | |
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>
| -rw-r--r-- | drivers/gpio/gpio-janz-ttl.c | 2 |
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) |