linux-kernel - [PATCH V2 net-next 03/11] net: hns3: remove upgrade reset level when reset fail

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Message-ID: <1564111502-15504-4-git-send-email-tanhuazhong@huawei.com>
Date:   Fri, 26 Jul 2019 11:24:54 +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>, Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH V2 net-next 03/11] net: hns3: remove upgrade reset level when reset fail

Currently, hclge_reset_err_handle() will assert a global reset
when the failing count is smaller than MAX_RESET_FAIL_CNT, which
will affect other running functions.

So this patch removes this upgrading, and uses re-scheduling reset
task to do it.

Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@...wei.com>
---
 .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c    | 28 +++++++---------------
 1 file changed, 8 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 3fde5471..3c64d70 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -3305,7 +3305,7 @@ static int hclge_reset_prepare_wait(struct hclge_dev *hdev)
 	return ret;
 }
 
-static bool hclge_reset_err_handle(struct hclge_dev *hdev, bool is_timeout)
+static bool hclge_reset_err_handle(struct hclge_dev *hdev)
 {
 #define MAX_RESET_FAIL_CNT 5
 
@@ -3322,20 +3322,11 @@ static bool hclge_reset_err_handle(struct hclge_dev *hdev, bool is_timeout)
 		return false;
 	} else if (hdev->reset_fail_cnt < MAX_RESET_FAIL_CNT) {
 		hdev->reset_fail_cnt++;
-		if (is_timeout) {
-			set_bit(hdev->reset_type, &hdev->reset_pending);
-			dev_info(&hdev->pdev->dev,
-				 "re-schedule to wait for hw reset done\n");
-			return true;
-		}
-
-		dev_info(&hdev->pdev->dev, "Upgrade reset level\n");
-		hclge_clear_reset_cause(hdev);
-		set_bit(HNAE3_GLOBAL_RESET, &hdev->default_reset_request);
-		mod_timer(&hdev->reset_timer,
-			  jiffies + HCLGE_RESET_INTERVAL);
-
-		return false;
+		set_bit(hdev->reset_type, &hdev->reset_pending);
+		dev_info(&hdev->pdev->dev,
+			 "re-schedule reset task(%d)\n",
+			 hdev->reset_fail_cnt);
+		return true;
 	}
 
 	hclge_clear_reset_cause(hdev);
@@ -3382,7 +3373,6 @@ static int hclge_reset_stack(struct hclge_dev *hdev)
 static void hclge_reset(struct hclge_dev *hdev)
 {
 	struct hnae3_ae_dev *ae_dev = pci_get_drvdata(hdev->pdev);
-	bool is_timeout = false;
 	int ret;
 
 	/* Initialize ae_dev reset status as well, in case enet layer wants to
@@ -3410,10 +3400,8 @@ static void hclge_reset(struct hclge_dev *hdev)
 	if (ret)
 		goto err_reset;
 
-	if (hclge_reset_wait(hdev)) {
-		is_timeout = true;
+	if (hclge_reset_wait(hdev))
 		goto err_reset;
-	}
 
 	hdev->rst_stats.hw_reset_done_cnt++;
 
@@ -3465,7 +3453,7 @@ static void hclge_reset(struct hclge_dev *hdev)
 err_reset_lock:
 	rtnl_unlock();
 err_reset:
-	if (hclge_reset_err_handle(hdev, is_timeout))
+	if (hclge_reset_err_handle(hdev))
 		hclge_reset_task_schedule(hdev);
 }
 
-- 
2.7.4