[dpdk-dev] [PATCH] bond: use existing enslaved device queues

[Eric Kinzie]

This solves issues when an active device is added to a bond.

If a device to be enslaved already has transmit and/or receive queues
allocated, use those and then create any additional queues that are
necessary.

Fixes: 2efb58cbab6e ("bond: new link bonding library")

Signed-off-by: Eric Kinzie <ehkinzie at gmail.com>
---
 drivers/net/bonding/rte_eth_bond_pmd.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c 
b/drivers/net/bonding/rte_eth_bond_pmd.c
index 011150a..7472e9d 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -1305,6 +1305,8 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
        struct bond_rx_queue *bd_rx_q;
        struct bond_tx_queue *bd_tx_q;

+       uint16_t old_nb_tx_queues = slave_eth_dev->data->nb_tx_queues;
+       uint16_t old_nb_rx_queues = slave_eth_dev->data->nb_rx_queues;
        int errval;
        uint16_t q_id;

@@ -1345,7 +1347,9 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
        }

        /* Setup Rx Queues */
-       for (q_id = 0; q_id < bonded_eth_dev->data->nb_rx_queues; q_id++) {
+       /* Use existing queues, if any */
+       for (q_id = old_nb_rx_queues;
+            q_id < bonded_eth_dev->data->nb_rx_queues; q_id++) {
                bd_rx_q = (struct bond_rx_queue 
*)bonded_eth_dev->data->rx_queues[q_id];

                errval = rte_eth_rx_queue_setup(slave_eth_dev->data->port_id, 
q_id,
@@ -1361,7 +1365,9 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
        }

        /* Setup Tx Queues */
-       for (q_id = 0; q_id < bonded_eth_dev->data->nb_tx_queues; q_id++) {
+       /* Use existing queues, if any */
+       for (q_id = old_nb_tx_queues;
+            q_id < bonded_eth_dev->data->nb_tx_queues; q_id++) {
                bd_tx_q = (struct bond_tx_queue 
*)bonded_eth_dev->data->tx_queues[q_id];

                errval = rte_eth_tx_queue_setup(slave_eth_dev->data->port_id, 
q_id,
-- 
1.7.10.4