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net: hns3: fix "tc qdisc del" failed issue

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The HNS3 driver supports to configure TC numbers and TC to priority
map via "tc" tool. But when delete the rule, will fail, because
the HNS3 driver needs at least one TC, but the "tc" tool sets TC
number to zero when delete.

This patch makes sure that the TC number is at least one.

Fixes: 30d240dfa2 ("net: hns3: Add mqprio hardware offload support in hns3 driver")
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>
This commit is contained in:
Yonglong Liu 2020-03-12 15:11:03 +08:00 committed by David S. Miller
parent b09fe70ef5
commit 5eb01ddfcf
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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@ -1711,7 +1711,7 @@ static int hns3_setup_tc(struct net_device *netdev, void *type_data)
netif_dbg(h, drv, netdev, "setup tc: num_tc=%u\n", tc); netif_dbg(h, drv, netdev, "setup tc: num_tc=%u\n", tc);
return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ? return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP; kinfo->dcb_ops->setup_tc(h, tc ? tc : 1, prio_tc) : -EOPNOTSUPP;
} }
static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type, static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,