linux-kernel - [PATCH V2 net-next 1/4] net: hns3: add a resetting check in hclgevf_init_nic_client

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Message-ID: <1590541157-6803-2-git-send-email-tanhuazhong@huawei.com>
Date:   Wed, 27 May 2020 08:59:14 +0800
From:   Huazhong Tan <tanhuazhong@...wei.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <linuxarm@...wei.com>, <kuba@...nel.org>,
        Guangbin Huang <huangguangbin2@...wei.com>,
        Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH V2 net-next 1/4] net: hns3: add a resetting check in hclgevf_init_nic_client_instance()

From: Guangbin Huang <huangguangbin2@...wei.com>

To prevent from initializing VF NIC client in reset handling state,
this patch adds resetting check in hclgevf_init_nic_client_instance().

Signed-off-by: Guangbin Huang <huangguangbin2@...wei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 32341dc..59fcb80 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -2713,6 +2713,7 @@ static int hclgevf_init_nic_client_instance(struct hnae3_ae_dev *ae_dev,
 					    struct hnae3_client *client)
 {
 	struct hclgevf_dev *hdev = ae_dev->priv;
+	int rst_cnt = hdev->rst_stats.rst_cnt;
 	int ret;
 
 	ret = client->ops->init_instance(&hdev->nic);
@@ -2720,6 +2721,14 @@ static int hclgevf_init_nic_client_instance(struct hnae3_ae_dev *ae_dev,
 		return ret;
 
 	set_bit(HCLGEVF_STATE_NIC_REGISTERED, &hdev->state);
+	if (test_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state) ||
+	    rst_cnt != hdev->rst_stats.rst_cnt) {
+		clear_bit(HCLGEVF_STATE_NIC_REGISTERED, &hdev->state);
+
+		client->ops->uninit_instance(&hdev->nic, 0);
+		return -EBUSY;
+	}
+
 	hnae3_set_client_init_flag(client, ae_dev, 1);
 
 	if (netif_msg_drv(&hdev->nic))
-- 
2.7.4