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net: hns: add netif_carrier_off before change speed and duplex 

If there are packets in hardware when changing the speed
or duplex, it may cause hardware hang up.

This patch adds netif_carrier_off before change speed and
duplex in ethtool_ops.set_link_ksettings, and adds
netif_carrier_on after complete the change.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Peng Li 2018-08-27 09:59:30 +08:00 committed by David S. Miller
parent 31fabbee8f
commit 455c4401fe
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
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@ -243,7 +243,9 @@ static int hns_nic_set_link_ksettings(struct net_device *net_dev,
}
if (h->dev->ops->adjust_link) {
netif_carrier_off(net_dev);
h->dev->ops->adjust_link(h, (int)speed, cmd->base.duplex);
netif_carrier_on(net_dev);
return 0;
}