net/hns3: fix maximum queues on configuration failure

[ upstream commit 5b96963 ]

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: fa29fe4 ("net/hns3: support queue start and stop")

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>

drivers/net/hns3/hns3_ethdev.c

@@ -2380,6 +2380,7 @@ 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;
 	}
 
@@ -2439,6 +2440,7 @@ 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;
 

drivers/net/hns3/hns3_ethdev_vf.c

@@ -802,6 +802,7 @@ 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;
 	}
 
@@ -871,6 +872,7 @@ 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;