netdev - [PATCH net] hinic: fix sending pkts from core while self testing

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Date:   Fri, 18 Sep 2020 12:09:38 +0800
From:   Luo bin <luobin9@...wei.com>
To:     <davem@...emloft.net>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <luoxianjun@...wei.com>, <yin.yinshi@...wei.com>,
        <cloud.wangxiaoyun@...wei.com>, <chiqijun@...wei.com>,
        <zengweiliang.zengweiliang@...wei.com>
Subject: [PATCH net] hinic: fix sending pkts from core while self testing

Call netif_tx_disable firstly before starting doing self-test to
avoid sending packet from networking core and self-test packet
simultaneously which may cause self-test failure or hw abnormal.

Fixes: 4aa218a4fe77 ("hinic: add self test support")
Signed-off-by: Luo bin <luobin9@...wei.com>
---
 drivers/net/ethernet/huawei/hinic/hinic_ethtool.c | 4 ++++
 drivers/net/ethernet/huawei/hinic/hinic_tx.c      | 4 ++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_ethtool.c b/drivers/net/ethernet/huawei/hinic/hinic_ethtool.c
index 6bb65ade1d77..c340d9acba80 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_ethtool.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_ethtool.c
@@ -1654,6 +1654,7 @@ static void hinic_diag_test(struct net_device *netdev,
 	}
 
 	netif_carrier_off(netdev);
+	netif_tx_disable(netdev);
 
 	err = do_lp_test(nic_dev, eth_test->flags, LP_DEFAULT_TIME,
 			 &test_index);
@@ -1662,9 +1663,12 @@ static void hinic_diag_test(struct net_device *netdev,
 		data[test_index] = 1;
 	}
 
+	netif_tx_wake_all_queues(netdev);
+
 	err = hinic_port_link_state(nic_dev, &link_state);
 	if (!err && link_state == HINIC_LINK_STATE_UP)
 		netif_carrier_on(netdev);
+
 }
 
 static int hinic_set_phys_id(struct net_device *netdev,
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_tx.c b/drivers/net/ethernet/huawei/hinic/hinic_tx.c
index 2b418b568767..c1f81e9144a1 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_tx.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_tx.c
@@ -717,8 +717,8 @@ static int free_tx_poll(struct napi_struct *napi, int budget)
 		netdev_txq = netdev_get_tx_queue(txq->netdev, qp->q_id);
 
 		__netif_tx_lock(netdev_txq, smp_processor_id());
-
-		netif_wake_subqueue(nic_dev->netdev, qp->q_id);
+		if (!netif_testing(nic_dev->netdev))
+			netif_wake_subqueue(nic_dev->netdev, qp->q_id);
 
 		__netif_tx_unlock(netdev_txq);
 
-- 
2.17.1