netdev - [PATCH net-next 14/20] net: hns3: fix for updating fc_mode_last

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Date:   Fri, 5 Jan 2018 18:18:18 +0800
From:   Peng Li <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 net-next 14/20] net: hns3: fix for updating fc_mode_last_time

From: Fuyun Liang <liangfuyun1@...wei.com>

commit a9c782822166 ("net: hns3: add support for set_pauseparam")
adds set_pauseparam support for ethtool cmd, but forgets to update
fc_mode_last_time when PFC mode is disabled in hclge_cfg_pauseparam().
The wrong fc_mode_last_time will be used to update flow control mode
when lldpad has been running. As a result, when using the ethtool
command "-a", user will get a wrong pause parameter.

This patch adds the fc_mode_last_time update when PFC mode is disabled.

Fixes: a9c782822166 ("net: hns3: add support for set_pauseparam")
Signed-off-by: Fuyun Liang <liangfuyun1@...wei.com>
Signed-off-by: Peng Li <lipeng321@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 8004922..fcda9a2 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -4707,22 +4707,19 @@ static void hclge_set_flowctrl_adv(struct hclge_dev *hdev, u32 rx_en, u32 tx_en)
 
 static int hclge_cfg_pauseparam(struct hclge_dev *hdev, u32 rx_en, u32 tx_en)
 {
-	enum hclge_fc_mode fc_mode;
 	int ret;
 
 	if (rx_en && tx_en)
-		fc_mode = HCLGE_FC_FULL;
+		hdev->fc_mode_last_time = HCLGE_FC_FULL;
 	else if (rx_en && !tx_en)
-		fc_mode = HCLGE_FC_RX_PAUSE;
+		hdev->fc_mode_last_time = HCLGE_FC_RX_PAUSE;
 	else if (!rx_en && tx_en)
-		fc_mode = HCLGE_FC_TX_PAUSE;
+		hdev->fc_mode_last_time = HCLGE_FC_TX_PAUSE;
 	else
-		fc_mode = HCLGE_FC_NONE;
+		hdev->fc_mode_last_time = HCLGE_FC_NONE;
 
-	if (hdev->tm_info.fc_mode == HCLGE_FC_PFC) {
-		hdev->fc_mode_last_time = fc_mode;
+	if (hdev->tm_info.fc_mode == HCLGE_FC_PFC)
 		return 0;
-	}
 
 	ret = hclge_mac_pause_en_cfg(hdev, tx_en, rx_en);
 	if (ret) {
@@ -4731,7 +4728,7 @@ static int hclge_cfg_pauseparam(struct hclge_dev *hdev, u32 rx_en, u32 tx_en)
 		return ret;
 	}
 
-	hdev->tm_info.fc_mode = fc_mode;
+	hdev->tm_info.fc_mode = hdev->fc_mode_last_time;
 
 	return 0;
 }
-- 
1.9.1