[dpdk-dev] [PATCH] net/octeontx2: fix device configuration sequence

[pbhagavatula at marvell.com]

From: Pavan Nikhilesh <pbhagavatula at marvell.com>

When an application invokes rte_eth_dev_configure consecutively without
setting up Rx/Tx queues, it will incorrectly return error while trying
to restore Rx/Tx queue configuration.

Fix configuration sequence by checking if any Rx/Tx queues are
previously configured before trying to restore them.

Fixes: 548b5839a32b ("net/octeontx2: add device configure operation")
Cc: stable at dpdk.org

Signed-off-by: Pavan Nikhilesh <pbhagavatula at marvell.com>
---
 drivers/net/octeontx2/otx2_ethdev.c | 16 ++++++++++++----
 drivers/net/octeontx2/otx2_ethdev.h |  1 +
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/net/octeontx2/otx2_ethdev.c b/drivers/net/octeontx2/otx2_ethdev.c
index e60f4901c..9fbca2b05 100644
--- a/drivers/net/octeontx2/otx2_ethdev.c
+++ b/drivers/net/octeontx2/otx2_ethdev.c
@@ -1132,10 +1132,12 @@ nix_store_queue_cfg_and_then_release(struct rte_eth_dev *eth_dev)
 	txq = (struct otx2_eth_txq **)eth_dev->data->tx_queues;
 	for (i = 0; i < nb_txq; i++) {
 		if (txq[i] == NULL) {
-			otx2_err("txq[%d] is already released", i);
-			goto fail;
+			tx_qconf[i].valid = false;
+			otx2_info("txq[%d] is already released", i);
+			continue;
 		}
 		memcpy(&tx_qconf[i], &txq[i]->qconf, sizeof(*tx_qconf));
+		tx_qconf[i].valid = true;
 		otx2_nix_tx_queue_release(txq[i]);
 		eth_dev->data->tx_queues[i] = NULL;
 	}
@@ -1143,10 +1145,12 @@ nix_store_queue_cfg_and_then_release(struct rte_eth_dev *eth_dev)
 	rxq = (struct otx2_eth_rxq **)eth_dev->data->rx_queues;
 	for (i = 0; i < nb_rxq; i++) {
 		if (rxq[i] == NULL) {
-			otx2_err("rxq[%d] is already released", i);
-			goto fail;
+			rx_qconf[i].valid = false;
+			otx2_info("rxq[%d] is already released", i);
+			continue;
 		}
 		memcpy(&rx_qconf[i], &rxq[i]->qconf, sizeof(*rx_qconf));
+		rx_qconf[i].valid = true;
 		otx2_nix_rx_queue_release(rxq[i]);
 		eth_dev->data->rx_queues[i] = NULL;
 	}
@@ -1201,6 +1205,8 @@ nix_restore_queue_cfg(struct rte_eth_dev *eth_dev)
 	 * queues are already setup in port_configure().
 	 */
 	for (i = 0; i < nb_txq; i++) {
+		if (!tx_qconf[i].valid)
+			continue;
 		rc = otx2_nix_tx_queue_setup(eth_dev, i, tx_qconf[i].nb_desc,
 					     tx_qconf[i].socket_id,
 					     &tx_qconf[i].conf.tx);
@@ -1216,6 +1222,8 @@ nix_restore_queue_cfg(struct rte_eth_dev *eth_dev)
 	free(tx_qconf); tx_qconf = NULL;
 
 	for (i = 0; i < nb_rxq; i++) {
+		if (!rx_qconf[i].valid)
+			continue;
 		rc = otx2_nix_rx_queue_setup(eth_dev, i, rx_qconf[i].nb_desc,
 					     rx_qconf[i].socket_id,
 					     &rx_qconf[i].conf.rx,
diff --git a/drivers/net/octeontx2/otx2_ethdev.h b/drivers/net/octeontx2/otx2_ethdev.h
index e5684f9f0..238afb3a8 100644
--- a/drivers/net/octeontx2/otx2_ethdev.h
+++ b/drivers/net/octeontx2/otx2_ethdev.h
@@ -196,6 +196,7 @@ struct otx2_eth_qconf {
 	void *mempool;
 	uint32_t socket_id;
 	uint16_t nb_desc;
+	uint8_t valid;
 };
 
 struct otx2_fc_info {
-- 
2.17.1