strncmp(algo, "toggle", 6) doesn't compare the trailing '\0' byte, so
using
hw_algo = "toggleboggle"
is recognized the same way as
hw_algo = "toggle"
. While this doesn't introduce any problems for a device tree that
sticks to the documented settings it's still ugly.
Fix this by using strcmp to only match on "toggle" and "level".
Signed-off-by: Uwe Kleine-König <[email protected]>
---
drivers/watchdog/gpio_wdt.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/gpio_wdt.c b/drivers/watchdog/gpio_wdt.c
index 1687cc2d7122..57d30f1f55ab 100644
--- a/drivers/watchdog/gpio_wdt.c
+++ b/drivers/watchdog/gpio_wdt.c
@@ -182,10 +182,10 @@ static int gpio_wdt_probe(struct platform_device *pdev)
ret = of_property_read_string(pdev->dev.of_node, "hw_algo", &algo);
if (ret)
return ret;
- if (!strncmp(algo, "toggle", 6)) {
+ if (!strcmp(algo, "toggle")) {
priv->hw_algo = HW_ALGO_TOGGLE;
f = GPIOF_IN;
- } else if (!strncmp(algo, "level", 5)) {
+ } else if (!strcmp(algo, "level")) {
priv->hw_algo = HW_ALGO_LEVEL;
f = priv->active_low ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
} else {
--
2.1.4
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