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net: hns: bug fix about TSO on|off when there is traffic 

When enable/disable tso, the driver tries to access the hardware register,
but this operation will cause the port unavalible when there is traffic.
This patch tries to enable TSO when initialize, then control tso through
TSE bit in transmit descriptor.

Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daode Huang 2016-06-21 11:56:39 +08:00 committed by David S. Miller
parent f28f34cdef
commit 6fe27464d8
1 changed files with 4 additions and 4 deletions
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8
drivers/net/ethernet/hisilicon/hns/hns_enet.c
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@ -1441,7 +1441,6 @@ static int hns_nic_set_features(struct net_device *netdev,
netdev_features_t features)
{
struct hns_nic_priv *priv = netdev_priv(netdev);
struct hnae_handle *h = priv->ae_handle;
switch (priv->enet_ver) {
case AE_VERSION_1:
@ -1454,11 +1453,9 @@ static int hns_nic_set_features(struct net_device *netdev,
priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
/* The chip only support 7*4096 */
netif_set_gso_max_size(netdev, 7 * 4096);
h->dev->ops->set_tso_stats(h, 1);
} else {
priv->ops.fill_desc = fill_v2_desc;
priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
h->dev->ops->set_tso_stats(h, 0);
}
break;
}
@ -1804,11 +1801,14 @@ static void hns_nic_set_priv_ops(struct net_device *netdev)
priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
/* This chip only support 7*4096 */
netif_set_gso_max_size(netdev, 7 * 4096);
h->dev->ops->set_tso_stats(h, 1);
} else {
priv->ops.fill_desc = fill_v2_desc;
priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
}
/* enable tso when init
* control tso on/off through TSE bit in bd
*/
h->dev->ops->set_tso_stats(h, 1);
}
}