linux-kernel - [PATCH 4.18 008/228] net: hns3: Fix for mac pause not disable in pfc mode

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Date:   Tue,  2 Oct 2018 06:21:45 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yunsheng Lin <linyunsheng@...wei.com>,
        Peng Li <lipeng321@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 008/228] net: hns3: Fix for mac pause not disable in pfc mode

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yunsheng Lin <linyunsheng@...wei.com>

[ Upstream commit 6d0ec65cb5810f9bf08671be008785bb8c84d39f ]

When pfc pause mode is enable, the mac pause mode need to be
disabled, otherwise the pfc pause packet will not be sent when
congestion happens.

This patch fixes by disabling the mac pause when pfc pause is
enabled.

Fixes: 848440544b41 ("net: hns3: Add support of TX Scheduler & Shaper to HNS3 driver")
Signed-off-by: Yunsheng Lin <linyunsheng@...wei.com>
Signed-off-by: Peng Li <lipeng321@...wei.com>
Signed-off-by: Salil Mehta <salil.mehta@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c
@@ -1223,6 +1223,10 @@ static int hclge_mac_pause_setup_hw(stru
 		tx_en = true;
 		rx_en = true;
 		break;
+	case HCLGE_FC_PFC:
+		tx_en = false;
+		rx_en = false;
+		break;
 	default:
 		tx_en = true;
 		rx_en = true;
@@ -1240,8 +1244,9 @@ int hclge_pause_setup_hw(struct hclge_de
 	if (ret)
 		return ret;
 
-	if (hdev->tm_info.fc_mode != HCLGE_FC_PFC)
-		return hclge_mac_pause_setup_hw(hdev);
+	ret = hclge_mac_pause_setup_hw(hdev);
+	if (ret)
+		return ret;
 
 	/* Only DCB-supported dev supports qset back pressure and pfc cmd */
 	if (!hnae3_dev_dcb_supported(hdev))