From 04296e97b6d83f979e1c0c9dab4911de73badce5 Mon Sep 17 00:00:00 2001
From: guozhanxin <guozhanxin@rt-thread.com>
Date: Wed, 3 Jul 2019 22:30:14 +0800
Subject: [PATCH] =?UTF-8?q?[netdev]=20Add=20a=20non-null=20judgment=20to?=
 =?UTF-8?q?=20the=20netstat=20command.|=E4=B8=BA=20netstat=20=E5=91=BD?=
 =?UTF-8?q?=E4=BB=A4=E6=B7=BB=E5=8A=A0=E9=9D=9E=E7=A9=BA=E5=88=A4=E6=96=AD?=
 =?UTF-8?q?=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 components/net/netdev/src/netdev.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/components/net/netdev/src/netdev.c b/components/net/netdev/src/netdev.c
index bbaae26077..b8b0504dd5 100644
--- a/components/net/netdev/src/netdev.c
+++ b/components/net/netdev/src/netdev.c
@@ -1159,7 +1159,14 @@ static void netdev_cmd_netstat(void)
         }
     }
 
-    netdev->ops->netstat(netdev);
+    if (netdev->ops->netstat != RT_NULL)
+    {
+        netdev->ops->netstat(netdev);
+    }
+    else
+    {
+        rt_kprintf("netstat: this command is not supported!\n");
+    }
 }
 
 int netdev_netstat(int argc, char **argv)