[PATCH] watchdog: imx: error out on negative timeouts

[Uwe Kleine-König]

I'm not sure where a negative timeout could come from but making the
code more robust for no additional runtime cost is good nevertheless.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
---
 drivers/watchdog/imxwd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/imxwd.c b/drivers/watchdog/imxwd.c
index 31c3d0d85353..66e9f6848f74 100644
--- a/drivers/watchdog/imxwd.c
+++ b/drivers/watchdog/imxwd.c
@@ -87,7 +87,7 @@ static int imx21_watchdog_set_timeout(struct imx_wd *priv, int timeout)
 
 	dev_dbg(priv->dev, "%s: %d\n", __func__, timeout);
 
-	if (!timeout || timeout > 128)
+	if (timeout <= 0 || timeout > 128)
 		return -EINVAL;
 
 	if (timeout > 0)
-- 
2.1.4