linux-kernel - [PATCH AUTOSEL for 4.14 64/97] net: hns3: fix for changing MTU

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Date:   Mon, 19 Mar 2018 15:55:54 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Fuyun Liang <liangfuyun1@...wei.com>,
        Peng Li <lipeng321@...wei.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.14 64/97] net: hns3: fix for changing MTU

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

[ Upstream commit 5bad95a1e55f4d5bb41e130db859d57eaf1b1549 ]

when changing MTU, The new MTU must need to be set to netdevice.

Fixes: a8e8b7ff3517 ("net: hns3: Add support to change MTU in HNS3 hardware")
Signed-off-by: Fuyun Liang <liangfuyun1@...wei.com>
Signed-off-by: Peng Li <lipeng321@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
index fad480e323dd..d1e4dcec5db2 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
@@ -1313,6 +1313,8 @@ static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
 		return ret;
 	}
 
+	netdev->mtu = new_mtu;
+
 	/* if the netdev was running earlier, bring it up again */
 	if (if_running && hns3_nic_net_open(netdev))
 		ret = -EINVAL;
-- 
2.14.1