diff --git a/sealing_key/src/sealing_key.c b/sealing_key/src/sealing_key.c
index b582dd5df9c7a69f40b3254403a6d45dbc17511a..65283d0ea68ad205cbb726a0c5638051d06a1e5b 100644
--- a/sealing_key/src/sealing_key.c
+++ b/sealing_key/src/sealing_key.c
@@ -57,11 +57,11 @@ static int smc_sealing_key(uint32_t alg, uint8_t *user_param, uint32_t user_para
 static int check_malloc_params(struct sealing_key_params *seal_params, uint8_t **user_param, uint8_t **sealing_key)
 {
     if (seal_params->alg != SEALING_HMAC_SHA256) {
-        ERR("not support alg %d\n", seal_params->alg);
+        ERR("not support alg %u\n", seal_params->alg);
         return -EINVAL;
     }
     if (seal_params->user_param_len != 0 && seal_params->user_param_len != SEALING_PARAM_LEN) {
-        ERR("invalid user_param len %d", seal_params->user_param_len);
+        ERR("invalid user_param len %u", seal_params->user_param_len);
         return -EINVAL;
     }
 
@@ -144,7 +144,7 @@ static long seal_device_ioctl(struct file *fp, unsigned int cmd, unsigned long a
         ret = cmd_get_sealing_key(argp);
         break;
     default:
-        ERR("invalid command %d", cmd);
+        ERR("invalid command %u", cmd);
         ret = -ENOTTY;
     }
 
@@ -214,4 +214,7 @@ static void __exit seal_exit(void)
 
 module_init(seal_init);
 module_exit(seal_exit);
-MODULE_LICENSE("GPL");
\ No newline at end of file
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Chenzheng <chenzheng71@huawei.com>");
+MODULE_DESCRIPTION("Get sealing key from tmm module");
\ No newline at end of file
diff --git a/tmm_driver/src/tmm_driver.c b/tmm_driver/src/tmm_driver.c
index a71656d36a5cf1f526b0c372fb4ce81745dd0aff..e3a1480ab3321d0d03dcc1390c8861ada395d1bd 100644
--- a/tmm_driver/src/tmm_driver.c
+++ b/tmm_driver/src/tmm_driver.c
@@ -14,7 +14,7 @@
 #include <asm/page.h>
 
 MODULE_LICENSE("GPL");
-MODULE_AUTHOR("HUAWEI TECHNOLOGIES CO., LTD.");
+MODULE_AUTHOR("Chenzheng <chenzheng71@huawei.com>");
 MODULE_DESCRIPTION("Get tmm base memory info module");
 
 #define TMM_MAX_NODE_NUM 8
@@ -380,6 +380,10 @@ static int __init tmm_driver_init(void)
     int rc;
 
     tmm_kobj = kobject_create_and_add("tmm", kernel_kobj);
+    if (tmm_kobj == NULL) {
+        pr_err("tmm_driver: create tmm kobject failed\n");
+        return -1;
+    }
 
     rc = sysfs_create_file(tmm_kobj, &memory_info_attr.attr);
     if (rc) {