net/hns3: fix flow control exception

In multi-TC scenarios, MAC pause is not supported. Otherwise, only
TC0 can trigger pause frames, and other TCs cannot trigger pause
frames. In this case, flow control does not meet the expectation.

Fixes: 62e3ccc2b94c ("net/hns3: support flow control")
Cc: stable@dpdk.org
Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 56b3032..2fa0bfa 100644 (file)
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -5554,6 +5554,11 @@ hns3_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
                return -EOPNOTSUPP;
        }
 
+       if (hw->num_tc > 1) {
+               hns3_err(hw, "in multi-TC scenarios, MAC pause is not supported.");
+               return -EOPNOTSUPP;
+       }
+
        hns3_get_fc_mode(hw, fc_conf->mode);
        if (hw->requested_mode == hw->current_mode &&
            pf->pause_time == fc_conf->pause_time)