netdev - [PATCH V2 net-next 9/9] net: hns3: hns3:fix a bug about statistic counter in reset process

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Message-ID: <1509626723-18619-10-git-send-email-lipeng321@huawei.com>
Date:   Thu, 2 Nov 2017 20:45:23 +0800
From:   Lipeng <lipeng321@...wei.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <salil.mehta@...wei.com>,
        <lipeng321@...wei.com>
Subject: [PATCH V2 net-next 9/9] net: hns3: hns3:fix a bug about statistic counter in reset process

From: qumingguang <qumingguang@...wei.com>

All member of Struct hdev->hw_stats is initialized to 0 as hdev is
allocated by devm_kzalloc. But in reset process, hdev will not be
allocated again, so need clear hdev->hw_stats in reset process, otherwise
the statistic will be wrong after reset. This patch set all of the
statistic counters to zero after reset.

Signed-off-by: qumingguang <qumingguang@...wei.com>
Signed-off-by: Lipeng <lipeng321@...wei.com>
Signed-off-by: Yunsheng Lin <linyunsheng@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 699983a..c6ba890 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -4836,6 +4836,11 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
 	return ret;
 }
 
+static void hclge_stats_clear(struct hclge_dev *hdev)
+{
+	memset(&hdev->hw_stats, 0, sizeof(hdev->hw_stats));
+}
+
 static int hclge_reset_ae_dev(struct hnae3_ae_dev *ae_dev)
 {
 	struct hclge_dev *hdev = ae_dev->priv;
@@ -4844,6 +4849,8 @@ static int hclge_reset_ae_dev(struct hnae3_ae_dev *ae_dev)
 
 	set_bit(HCLGE_STATE_DOWN, &hdev->state);
 
+	hclge_stats_clear(hdev);
+
 	ret = hclge_cmd_init(hdev);
 	if (ret) {
 		dev_err(&pdev->dev, "Cmd queue init failed\n");
-- 
1.9.1