linux-kernel - [PATCH net-next 01/10] net: hns3: refactor reset_prepare

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Message-ID: <20211129140027.23036-2-huangguangbin2@huawei.com>
Date:   Mon, 29 Nov 2021 22:00:18 +0800
From:   Guangbin Huang <huangguangbin2@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <wangjie125@...wei.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <lipeng321@...wei.com>, <huangguangbin2@...wei.com>,
        <chenhao288@...ilicon.com>
Subject: [PATCH net-next 01/10] net: hns3: refactor reset_prepare_general retry statement

From: Jiaran Zhang <zhangjiaran@...wei.com>

Currently, the hclge_reset_prepare_general function uses the goto
statement to jump upwards, which increases code complexity and makes
the program structure difficult to understand. In addition, if
reset_pending is set, retry_cnt cannot be increased. This may result
in a failure to exit the retry or increase the number of retries.

Use the while statement instead to make the program easier to understand
and solve the problem that the goto statement cannot be exited.

Signed-off-by: Jiaran Zhang <zhangjiaran@...wei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@...wei.com>
---
 .../hisilicon/hns3/hns3pf/hclge_main.c        | 32 ++++++++-----------
 .../hisilicon/hns3/hns3vf/hclgevf_main.c      | 32 ++++++++-----------
 2 files changed, 28 insertions(+), 36 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index a0628d139149..5282f2632b3b 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -11589,24 +11589,20 @@ static void hclge_reset_prepare_general(struct hnae3_ae_dev *ae_dev,
 	int retry_cnt = 0;
 	int ret;
 
-retry:
-	down(&hdev->reset_sem);
-	set_bit(HCLGE_STATE_RST_HANDLING, &hdev->state);
-	hdev->reset_type = rst_type;
-	ret = hclge_reset_prepare(hdev);
-	if (ret || hdev->reset_pending) {
-		dev_err(&hdev->pdev->dev, "fail to prepare to reset, ret=%d\n",
-			ret);
-		if (hdev->reset_pending ||
-		    retry_cnt++ < HCLGE_RESET_RETRY_CNT) {
-			dev_err(&hdev->pdev->dev,
-				"reset_pending:0x%lx, retry_cnt:%d\n",
-				hdev->reset_pending, retry_cnt);
-			clear_bit(HCLGE_STATE_RST_HANDLING, &hdev->state);
-			up(&hdev->reset_sem);
-			msleep(HCLGE_RESET_RETRY_WAIT_MS);
-			goto retry;
-		}
+	while (retry_cnt++ < HCLGE_RESET_RETRY_CNT) {
+		down(&hdev->reset_sem);
+		set_bit(HCLGE_STATE_RST_HANDLING, &hdev->state);
+		hdev->reset_type = rst_type;
+		ret = hclge_reset_prepare(hdev);
+		if (!ret && !hdev->reset_pending)
+			break;
+
+		dev_err(&hdev->pdev->dev,
+			"failed to prepare to reset, ret=%d, reset_pending:0x%lx, retry_cnt:%d\n",
+			ret, hdev->reset_pending, retry_cnt);
+		clear_bit(HCLGE_STATE_RST_HANDLING, &hdev->state);
+		up(&hdev->reset_sem);
+		msleep(HCLGE_RESET_RETRY_WAIT_MS);
 	}
 
 	/* disable misc vector before reset done */
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
index 3f29062eaf2e..0568cc31d391 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -2166,24 +2166,20 @@ static void hclgevf_reset_prepare_general(struct hnae3_ae_dev *ae_dev,
 	int retry_cnt = 0;
 	int ret;
 
-retry:
-	down(&hdev->reset_sem);
-	set_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state);
-	hdev->reset_type = rst_type;
-	ret = hclgevf_reset_prepare(hdev);
-	if (ret) {
-		dev_err(&hdev->pdev->dev, "fail to prepare to reset, ret=%d\n",
-			ret);
-		if (hdev->reset_pending ||
-		    retry_cnt++ < HCLGEVF_RESET_RETRY_CNT) {
-			dev_err(&hdev->pdev->dev,
-				"reset_pending:0x%lx, retry_cnt:%d\n",
-				hdev->reset_pending, retry_cnt);
-			clear_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state);
-			up(&hdev->reset_sem);
-			msleep(HCLGEVF_RESET_RETRY_WAIT_MS);
-			goto retry;
-		}
+	while (retry_cnt++ < HCLGEVF_RESET_RETRY_CNT) {
+		down(&hdev->reset_sem);
+		set_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state);
+		hdev->reset_type = rst_type;
+		ret = hclgevf_reset_prepare(hdev);
+		if (!ret && !hdev->reset_pending)
+			break;
+
+		dev_err(&hdev->pdev->dev,
+			"failed to prepare to reset, ret=%d, reset_pending:0x%lx, retry_cnt:%d\n",
+			ret, hdev->reset_pending, retry_cnt);
+		clear_bit(HCLGEVF_STATE_RST_HANDLING, &hdev->state);
+		up(&hdev->reset_sem);
+		msleep(HCLGEVF_RESET_RETRY_WAIT_MS);
 	}
 
 	/* disable misc vector before reset done */
-- 
2.33.0