diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index db7d260..f769cfe 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -177,6 +177,13 @@
 {
 	pwm->chip->duty_ns = duty_ns;
 	pwm->chip->period_ns = period_ns;
+
+	if (period_ns == 0)
+		return -EINVAL;
+
+	if (duty_ns > period_ns)
+		return -EINVAL;
+
 	return pwm->chip->ops->config(pwm->chip, duty_ns, period_ns);
 }
 EXPORT_SYMBOL_GPL(pwm_config);