linux-kernel - [PATCH 4.14 056/138] net: hns3: fix for changing MTU

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Date:   Wed, 11 Apr 2018 00:24:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Fuyun Liang <liangfuyun1@...wei.com>,
        Peng Li <lipeng321@...wei.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.14 056/138] net: hns3: fix for changing MTU

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

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

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c |    2 ++
 1 file changed, 2 insertions(+)

--- 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 ne
 		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;