[dpdk-dev] [PATCH 3/6] net/hns3: fix incorrect fake queue rollback

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

From: Huisong Li <lihuisong@huawei.com>

When the device supports independent Rx/Tx queues, fake queues do not need
to be created in unequal Rx/Tx queues case. However, dev_configure fails
to be executed on the device supported independent Rx/Tx queues, the
current rollback code logic contains the fake queue. As a result, the fake
queue is created. When dev_configure is successfully called again, these
fake queues still exists and are configured to the hardware.

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    | 11 ++++-------
 drivers/net/hns3/hns3_ethdev_vf.c | 11 ++++-------
 drivers/net/hns3/hns3_rxtx.c      |  3 +++
 3 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 32719ff..7b0e938 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2497,13 +2497,10 @@ hns3_dev_configure(struct rte_eth_dev *dev)
 	 * work as usual. But these fake queues are imperceptible, and can not
 	 * be used by upper applications.
 	 */
-	if (!hns3_dev_indep_txrx_supported(hw)) {
-		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);
-			return ret;
-		}
+	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);
+		return ret;
 	}
 
 	hw->adapter_state = HNS3_NIC_CONFIGURING;
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index a198d07..e4908de 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -801,13 +801,10 @@ hns3vf_dev_configure(struct rte_eth_dev *dev)
 	 * work as usual. But these fake queues are imperceptible, and can not
 	 * be used by upper applications.
 	 */
-	if (!hns3_dev_indep_txrx_supported(hw)) {
-		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);
-			return ret;
-		}
+	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);
+		return ret;
 	}
 
 	hw->adapter_state = HNS3_NIC_CONFIGURING;
diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index 88d4fc0..0f80d16 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -1617,6 +1617,9 @@ hns3_set_fake_rx_or_tx_queues(struct rte_eth_dev *dev, uint16_t nb_rx_q,
 	uint16_t q;
 	int ret;
 
+	if (hns3_dev_indep_txrx_supported(hw))
+		return 0;
+
 	/* Setup new number of fake RX/TX queues and reconfigure device. */
 	rx_need_add_nb_q = hw->cfg_max_queues - nb_rx_q;
 	tx_need_add_nb_q = hw->cfg_max_queues - nb_tx_q;
-- 
2.7.4