From c168e40a0b80b02976ed1698339bc5182b2c0f39 Mon Sep 17 00:00:00 2001
From: root <wangzongchao@huawei.com>
Date: Sat, 3 Dec 2022 15:13:22 +0800
Subject: [PATCH] fix virtio hardthrough scenes device init bug

---
 drivers/net/virtio/virtio_ethdev.c | 1 +
 drivers/net/virtio/virtio_pci.c    | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 89e4c23..b54abe5 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1331,6 +1331,7 @@ virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
 		req_features);
 
 	/* Read device(host) feature bits */
+	usleep(3000);
 	host_features = VTPCI_OPS(hw)->get_features(hw);
 	PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
 		host_features);
diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
index 4468e89..2fade8f 100644
--- a/drivers/net/virtio/virtio_pci.c
+++ b/drivers/net/virtio/virtio_pci.c
@@ -2,6 +2,7 @@
  * Copyright(c) 2010-2014 Intel Corporation
  */
 #include <stdint.h>
+#include <unistd.h>
 
 #ifdef RTE_EXEC_ENV_LINUX
  #include <dirent.h>
@@ -472,6 +473,7 @@ vtpci_reset(struct virtio_hw *hw)
 {
 	VTPCI_OPS(hw)->set_status(hw, VIRTIO_CONFIG_STATUS_RESET);
 	/* flush status write */
+	usleep(1000);
 	VTPCI_OPS(hw)->get_status(hw);
 }
 
-- 
2.27.0