Fix some compilation warning (#5744)

* Fix some compilation warning

* 补充修正一些数据类型的使用错误

Co-authored-by: Meco Man <[email protected]>

2 files changed, 11 insertions, 10 deletions

diff --git a/components/net/netdev/src/netdev.c b/components/net/netdev/src/netdev.c
index 1009ace8d6..22be799ccc 100644
--- a/components/net/netdev/src/netdev.c
+++ b/components/net/netdev/src/netdev.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
+ * Copyright (c) 2006-2022, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -28,9 +28,9 @@
 #include <rtdbg.h>
 
 /* The list of network interface device */
-struct netdev *netdev_list;
+struct netdev *netdev_list = RT_NULL;
 /* The default network interface device */
-struct netdev *netdev_default;
+struct netdev *netdev_default = RT_NULL;
 
 /**
  * This function will register network interface device and
@@ -46,8 +46,8 @@ struct netdev *netdev_default;
 int netdev_register(struct netdev *netdev, const char *name, void *user_data)
 {
     rt_base_t level;
-    uint16_t flags_mask;
-    int index;
+    rt_uint16_t flags_mask;
+    rt_uint16_t index;
 
     RT_ASSERT(netdev);
     RT_ASSERT(name);
@@ -706,7 +706,7 @@ void netdev_low_level_set_gw(struct netdev *netdev, const ip_addr_t *gw)
  */
 void netdev_low_level_set_dns_server(struct netdev *netdev, uint8_t dns_num, const ip_addr_t *dns_server)
 {
-    int index;
+    unsigned int index;
 
     RT_ASSERT(dns_server);
 
@@ -1173,7 +1173,7 @@ MSH_CMD_EXPORT_ALIAS(netdev_ping, ping, ping network host);
 
 static void netdev_list_dns(void)
 {
-    int index = 0;
+    unsigned int index = 0;
     struct netdev *netdev = RT_NULL;
     rt_slist_t *node  = RT_NULL;
 
diff --git a/components/net/sal/src/sal_socket.c b/components/net/sal/src/sal_socket.c
index 7e00ebf9bf..3256b9f4d6 100644
--- a/components/net/sal/src/sal_socket.c
+++ b/components/net/sal/src/sal_socket.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
+ * Copyright (c) 2006-2022, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -158,7 +158,8 @@ static void check_netdev_internet_up_work(struct rt_work *work, void *work_data)
 #define SAL_INTERNET_MONTH_LEN 4
 #define SAL_INTERNET_DATE_LEN  16
 
-    int index, sockfd = -1, result = 0;
+    unsigned int index;
+    int sockfd = -1, result = 0;
     struct sockaddr_in server_addr;
     struct hostent *host;
     struct timeval timeout;
@@ -168,7 +169,7 @@ static void check_netdev_internet_up_work(struct rt_work *work, void *work_data)
 
     const char month[][SAL_INTERNET_MONTH_LEN] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
     char date[SAL_INTERNET_DATE_LEN];
-    int moth_num = 0;
+    unsigned int moth_num = 0;
 
     struct sal_proto_family *pf = (struct sal_proto_family *) netdev->sal_user_data;
     const struct sal_socket_ops *skt_ops;