From ae90273b68aeb25dfff2065116d01cf6feb8670f Mon Sep 17 00:00:00 2001
From: chao_king <37656088+ChazJin@users.noreply.github.com>
Date: Thu, 26 Dec 2019 19:03:46 +0800
Subject: [PATCH] Fix bug for drv_enet.c
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

源文件主要存在以下问题：
1> rt_hw_gd32_eth_init函数中对MAC初始化完成后并没有修改PHY的连接状态，这会导致测试TCP例程时无法建立TCP链接，应在初始化完成后将PHY的连接状态修改成linkup；

已在GD32450Z-EVAL开发板上测试，修改后没有再出现以上问题。
---
 bsp/gd32450z-eval/drivers/drv_enet.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/bsp/gd32450z-eval/drivers/drv_enet.c b/bsp/gd32450z-eval/drivers/drv_enet.c
index 0f8ce72db6..b1bf632f54 100644
--- a/bsp/gd32450z-eval/drivers/drv_enet.c
+++ b/bsp/gd32450z-eval/drivers/drv_enet.c
@@ -652,7 +652,10 @@ int rt_hw_gd32_eth_init(void)
     /* init tx buffer free semaphore */
     rt_sem_init(&gd32_emac_device0.tx_buf_free, "tx_buf0", EMAC_TXBUFNB, RT_IPC_FLAG_FIFO);
     eth_device_init(&(gd32_emac_device0.parent), "e0");
-    
+
+    /* change device link status */
+    eth_device_linkchange(&(gd32_emac_device0.parent), RT_TRUE);
+
     return 0;
 }
 INIT_DEVICE_EXPORT(rt_hw_gd32_eth_init);