diff --git a/bsp/fh8620/drivers/pwm.c b/bsp/fh8620/drivers/pwm.c
index ff02a5a6dba8398b97683bb9db9a5f1d029c174a..3eb5a8ccd20aea6734582dc4505a2aa6612a4731 100644
--- a/bsp/fh8620/drivers/pwm.c
+++ b/bsp/fh8620/drivers/pwm.c
@@ -190,6 +190,7 @@ int fh_pwm_probe(void *priv_data)
     if (pwm_dev == RT_NULL)
     {
         rt_kprintf("ERROR: %s rt_device malloc failed\n", __func__);
+        return -RT_EIO;
     }
     
     rt_memset(pwm_dev, 0, sizeof(struct rt_device));