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net: hns3: fix a TX timeout issue 

[ Upstream commit a7e90ee596 ]

When the queue depth and queue parameters are modified, there is
a low probability that TX timeout occurs. The two operations cause
the link to be down or up when the watchdog is still working. All
queues are stopped when the link is down. After the carrier is on,
all queues are woken up. If the watchdog detects the link between
the carrier on and wakeup queues, a false TX timeout occurs.

So fix this issue by modifying the sequence of carrier on and queue
wakeup, which is symmetrical to the link down action.

Fixes: 76ad4f0ee7 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Yonglong Liu 2020-07-28 10:16:49 +08:00 committed by Greg Kroah-Hartman
parent 5fc02e8d1b
commit 475b8d6192
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
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@ -4014,8 +4014,8 @@ static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
return;
if (linkup) {
netif_carrier_on(netdev);
netif_tx_wake_all_queues(netdev);
netif_carrier_on(netdev);
if (netif_msg_link(handle))
netdev_info(netdev, "link up\n");
} else {