diff options
| author | Peng Li <lipeng321@huawei.com> | 2018-08-27 09:59:29 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-08-29 18:08:20 -0700 |
| commit | 31fabbee8f5c658c3fa1603c66e9e4f51ea8c2c6 (patch) | |
| tree | 8b13f4154dca21073b6416a4d185e7e98a9a9b4f /drivers/net/ethernet/hisilicon/hns/hns_enet.c | |
| parent | 05212ba8132b42047ab5d63d759c6f9c28e7eab5 (diff) | |
| download | linux-31fabbee8f5c658c3fa1603c66e9e4f51ea8c2c6.tar.bz2 | |
net: hns: add the code for cleaning pkt in chip
If there are packets in hardware when changing the speed
or duplex, it may cause hardware hang up.
This patch adds the code for waiting chip to clean the all
pkts(TX & RX) in chip when the driver uses the function named
"adjust link".
This patch cleans the pkts as follows:
1) close rx of chip, close tx of protocol stack.
2) wait rcb, ppe, mac to clean.
3) adjust link
4) open rx of chip, open tx of protocol stack.
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/hisilicon/hns/hns_enet.c')
| -rw-r--r-- | drivers/net/ethernet/hisilicon/hns/hns_enet.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index 02a0ba20fad5..f56855e63c96 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -1112,11 +1112,26 @@ static void hns_nic_adjust_link(struct net_device *ndev) struct hnae_handle *h = priv->ae_handle; int state = 1; + /* If there is no phy, do not need adjust link */ if (ndev->phydev) { - h->dev->ops->adjust_link(h, ndev->phydev->speed, - ndev->phydev->duplex); - state = ndev->phydev->link; + /* When phy link down, do nothing */ + if (ndev->phydev->link == 0) + return; + + if (h->dev->ops->need_adjust_link(h, ndev->phydev->speed, + ndev->phydev->duplex)) { + /* because Hi161X chip don't support to change gmac + * speed and duplex with traffic. Delay 200ms to + * make sure there is no more data in chip FIFO. + */ + netif_carrier_off(ndev); + msleep(200); + h->dev->ops->adjust_link(h, ndev->phydev->speed, + ndev->phydev->duplex); + netif_carrier_on(ndev); + } } + state = state && h->dev->ops->get_status(h); if (state != priv->link) { |