[dpdk-dev] [PATCH 1/4] net/hns3: decrease the count when secondary process exits

["Min Hu (Connor)" <humin29@huawei.com>]

From: Huisong Li <lihuisong@huawei.com>

The "secondary_cnt" will be increased when a secondary process initialized.
But the value of this variable is not decreased when the secondary process
exits, which causes the primary process senses that the secondary process
still exists. As a result, the primary process fails to send messages to
the secondary process after the secondary process exits.

Fixes: 23d4b61fee5d ("net/hns3: support multiple process")
Cc: stable@dpdk.org

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c    | 10 +++++++---
 drivers/net/hns3/hns3_ethdev_vf.c | 10 +++++++---
 drivers/net/hns3/hns3_mp.c        |  4 +++-
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 56eca03833..2dd9881040 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -5849,8 +5849,10 @@ hns3_dev_close(struct rte_eth_dev *eth_dev)
 	struct hns3_hw *hw = &hns->hw;
 	int ret = 0;
 
-	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
+		__atomic_fetch_sub(&hw->secondary_cnt, 1, __ATOMIC_RELAXED);
 		return 0;
+	}
 
 	if (hw->adapter_state == HNS3_NIC_STARTED)
 		ret = hns3_dev_stop(eth_dev);
@@ -7376,7 +7378,7 @@ hns3_dev_init(struct rte_eth_dev *eth_dev)
 				     "process, ret = %d", ret);
 			goto err_mp_init_secondary;
 		}
-		hw->secondary_cnt++;
+		__atomic_fetch_add(&hw->secondary_cnt, 1, __ATOMIC_RELAXED);
 		hns3_tx_push_init(eth_dev);
 		return 0;
 	}
@@ -7479,8 +7481,10 @@ hns3_dev_uninit(struct rte_eth_dev *eth_dev)
 
 	PMD_INIT_FUNC_TRACE();
 
-	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
+		__atomic_fetch_sub(&hw->secondary_cnt, 1, __ATOMIC_RELAXED);
 		return 0;
+	}
 
 	if (hw->adapter_state < HNS3_NIC_CLOSING)
 		hns3_dev_close(eth_dev);
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 675db44e85..0f7eeb1d7e 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -1892,8 +1892,10 @@ hns3vf_dev_close(struct rte_eth_dev *eth_dev)
 	struct hns3_hw *hw = &hns->hw;
 	int ret = 0;
 
-	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
+		__atomic_fetch_sub(&hw->secondary_cnt, 1, __ATOMIC_RELAXED);
 		return 0;
+	}
 
 	if (hw->adapter_state == HNS3_NIC_STARTED)
 		ret = hns3vf_dev_stop(eth_dev);
@@ -2684,7 +2686,7 @@ hns3vf_dev_init(struct rte_eth_dev *eth_dev)
 					  "process, ret = %d", ret);
 			goto err_mp_init_secondary;
 		}
-		hw->secondary_cnt++;
+		__atomic_fetch_add(&hw->secondary_cnt, 1, __ATOMIC_RELAXED);
 		hns3_tx_push_init(eth_dev);
 		return 0;
 	}
@@ -2786,8 +2788,10 @@ hns3vf_dev_uninit(struct rte_eth_dev *eth_dev)
 
 	PMD_INIT_FUNC_TRACE();
 
-	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
+		__atomic_fetch_sub(&hw->secondary_cnt, 1, __ATOMIC_RELAXED);
 		return 0;
+	}
 
 	if (hw->adapter_state < HNS3_NIC_CLOSING)
 		hns3vf_dev_close(eth_dev);
diff --git a/drivers/net/hns3/hns3_mp.c b/drivers/net/hns3/hns3_mp.c
index cd514ac29c..c28598a53a 100644
--- a/drivers/net/hns3/hns3_mp.c
+++ b/drivers/net/hns3/hns3_mp.c
@@ -150,8 +150,10 @@ mp_req_on_rxtx(struct rte_eth_dev *dev, enum hns3_mp_req_type type)
 	int ret;
 	int i;
 
-	if (rte_eal_process_type() == RTE_PROC_SECONDARY || !hw->secondary_cnt)
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY ||
+		__atomic_load_n(&hw->secondary_cnt, __ATOMIC_RELAXED) == 0)
 		return;
+
 	if (!mp_req_type_is_valid(type)) {
 		hns3_err(hw, "port %u unknown request (req_type %d)",
 			 dev->data->port_id, type);
-- 
2.33.0