[PATCH v2 1/6] net/nfb: use constant values for max Rx/Tx queues count

[spinler at cesnet.cz]

From: Martin Spinler <spinler at cesnet.cz>

The nb_xx_queues values in the dev->data structure can be modified
dynamically by some apps. Use runtime-constant values from hardware
directly for max_rx_queues/max_tx_queues.

Fixes: 6435f9a0ac22 ("net/nfb: add new netcope driver")
Cc: stable at dpdk.org

Signed-off-by: Martin Spinler <spinler at cesnet.cz>
---
 drivers/net/nfb/nfb.h        |  3 +++
 drivers/net/nfb/nfb_ethdev.c | 10 ++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/net/nfb/nfb.h b/drivers/net/nfb/nfb.h
index a8b24ff822..8f8577860a 100644
--- a/drivers/net/nfb/nfb.h
+++ b/drivers/net/nfb/nfb.h
@@ -48,6 +48,9 @@ struct pmd_internals {
 	struct nc_rxmac *rxmac[RTE_MAX_NC_RXMAC];
 	struct nc_txmac *txmac[RTE_MAX_NC_TXMAC];
 	struct nfb_device *nfb;
+
+	int max_rx_queues;
+	int max_tx_queues;
 };
 
 #endif /* _NFB_H_ */
diff --git a/drivers/net/nfb/nfb_ethdev.c b/drivers/net/nfb/nfb_ethdev.c
index 98119d70fd..7a472a5f1e 100644
--- a/drivers/net/nfb/nfb_ethdev.c
+++ b/drivers/net/nfb/nfb_ethdev.c
@@ -237,11 +237,13 @@ static int
 nfb_eth_dev_info(struct rte_eth_dev *dev,
 	struct rte_eth_dev_info *dev_info)
 {
+	struct pmd_internals *internals = dev->data->dev_private;
+
 	dev_info->max_mac_addrs = nfb_eth_get_max_mac_address_count(dev);
 
 	dev_info->max_rx_pktlen = (uint32_t)-1;
-	dev_info->max_rx_queues = dev->data->nb_rx_queues;
-	dev_info->max_tx_queues = dev->data->nb_tx_queues;
+	dev_info->max_rx_queues = internals->max_rx_queues;
+	dev_info->max_tx_queues = internals->max_tx_queues;
 	dev_info->speed_capa = RTE_ETH_LINK_SPEED_100G;
 	dev_info->rx_offload_capa =
 		RTE_ETH_RX_OFFLOAD_TIMESTAMP;
@@ -538,8 +540,8 @@ nfb_eth_dev_init(struct rte_eth_dev *dev)
 		NFB_LOG(ERR, "nfb_open(): failed to open %s", nfb_dev);
 		return -EINVAL;
 	}
-	data->nb_rx_queues = ndp_get_rx_queue_available_count(internals->nfb);
-	data->nb_tx_queues = ndp_get_tx_queue_available_count(internals->nfb);
+	internals->max_rx_queues = ndp_get_rx_queue_available_count(internals->nfb);
+	internals->max_tx_queues = ndp_get_tx_queue_available_count(internals->nfb);
 
 	NFB_LOG(INFO, "Available NDP queues RX: %u TX: %u",
 		data->nb_rx_queues, data->nb_tx_queues);
-- 
2.52.0