[dpdk-dev] [PATCH 5/6] net/hns3: fix config max queues to zero when fails

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

From: Huisong Li <lihuisong@huawei.com>

The "cfg_max_queues" maintains configured max queue numbers from user,
and is equal to the maximum of "nb_rx_queues" and "nb_tx_queues" in
"dev->data".

From the ethdev layer framework, "nb_rx/tx_queues" in "dev->data" were set
to zero in rte_eth_dev_configure() if ops.dev_configure in PMD fails to be
executed, In addition, if ops.dev_configure in HNS3 PMD failed, the fake
queues are also cleared on a device that does not support independent Rx/Tx
queues.

Therefore, the "cfg_max_queues" should be also set to zero when
dev_configure fails.

Fixes: fa29fe45a7b4 ("net/hns3: support queue start and stop")
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    | 2 ++
 drivers/net/hns3/hns3_ethdev_vf.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index db96fbc..5f6daa9 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2501,6 +2501,7 @@ hns3_dev_configure(struct rte_eth_dev *dev)
 	ret = hns3_set_fake_rx_or_tx_queues(dev, nb_rx_q, nb_tx_q);
 	if (ret) {
 		hns3_err(hw, "fail to set Rx/Tx fake queues, ret = %d.", ret);
+		hw->cfg_max_queues = 0;
 		return ret;
 	}
 
@@ -2549,6 +2550,7 @@ hns3_dev_configure(struct rte_eth_dev *dev)
 	return 0;
 
 cfg_err:
+	hw->cfg_max_queues = 0;
 	(void)hns3_set_fake_rx_or_tx_queues(dev, 0, 0);
 	hw->adapter_state = HNS3_NIC_INITIALIZED;
 
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index e0a0797..e582503 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -804,6 +804,7 @@ hns3vf_dev_configure(struct rte_eth_dev *dev)
 	ret = hns3_set_fake_rx_or_tx_queues(dev, nb_rx_q, nb_tx_q);
 	if (ret) {
 		hns3_err(hw, "fail to set Rx/Tx fake queues, ret = %d.", ret);
+		hw->cfg_max_queues = 0;
 		return ret;
 	}
 
@@ -863,6 +864,7 @@ hns3vf_dev_configure(struct rte_eth_dev *dev)
 	return 0;
 
 cfg_err:
+	hw->cfg_max_queues = 0;
 	(void)hns3_set_fake_rx_or_tx_queues(dev, 0, 0);
 	hw->adapter_state = HNS3_NIC_INITIALIZED;
 
-- 
2.7.4