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

Sasha Levin
2018-03-19T21:58:21Z

From: Fuyun Liang <liangfuyun1@huawei.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@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.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