From 8937597cfe7caf6a2ca4353b5be6f828e114f600 Mon Sep 17 00:00:00 2001 From: Santoshkumar Karanappa Rastapur Date: Thu, 24 Oct 2019 13:14:27 +0530 Subject: [PATCH] net/bnxt: fix crash after removing and adding slaves On removing the slave interface, slave_remove in bonding module calls _rte_eth_dev_reset which in turn frees both Tx and Rx queues. 1. segfault is seen after removing/adding the slave interface and starting bond interface. In this below path, when mtu is set for the slave interface, queues are not created yet and driver reference to queue[0] causes the segfault. slave_configure: rte_eth_dev_set_mtu rte_eth_dev_configure rte_eth_rx_queue_setup 2. segfault is seen on starting the port after removing from bond device. This is a testpmd bug where in, on starting the port, testpmd is supposed to recreate the queues before starting the port. Fixed these by adding check for queues created before accessing them. Fixes: daef48efe5e5 ("net/bnxt: support set MTU") Cc: stable@dpdk.org Signed-off-by: Santoshkumar Karanappa Rastapur Signed-off-by: Somnath Kotur Signed-off-by: Ajit Khaparde --- drivers/net/bnxt/bnxt.h | 1 + drivers/net/bnxt/bnxt_ethdev.c | 19 ++++++++++++++++--- drivers/net/bnxt/bnxt_rxq.c | 4 ++++ 3 files changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h index 975bcf9c6b..ffc37ea2d8 100644 --- a/drivers/net/bnxt/bnxt.h +++ b/drivers/net/bnxt/bnxt.h @@ -639,6 +639,7 @@ struct bnxt { struct bnxt_error_recovery_info *recovery_info; }; +int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu); int bnxt_link_update_op(struct rte_eth_dev *eth_dev, int wait_to_complete); int bnxt_rcv_msg_from_vf(struct bnxt *bp, uint16_t vf_id, void *msg); int is_bnxt_in_error(struct bnxt *bp); diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c index e24fd41202..41872471ed 100644 --- a/drivers/net/bnxt/bnxt_ethdev.c +++ b/drivers/net/bnxt/bnxt_ethdev.c @@ -121,7 +121,6 @@ static const struct rte_pci_id bnxt_pci_id_map[] = { static int bnxt_vlan_offload_set_op(struct rte_eth_dev *dev, int mask); static void bnxt_print_link_info(struct rte_eth_dev *eth_dev); -static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu); static int bnxt_dev_uninit(struct rte_eth_dev *eth_dev); static int bnxt_init_resources(struct bnxt *bp, bool reconfig_dev); static int bnxt_uninit_resources(struct bnxt *bp, bool reconfig_dev); @@ -831,6 +830,11 @@ static int bnxt_dev_start_op(struct rte_eth_dev *eth_dev) int vlan_mask = 0; int rc; + if (!eth_dev->data->nb_tx_queues || !eth_dev->data->nb_rx_queues) { + PMD_DRV_LOG(ERR, "Queues are not configured yet!\n"); + return -EINVAL; + } + if (bp->rx_cp_nr_rings > RTE_ETHDEV_QUEUE_STAT_CNTRS) { PMD_DRV_LOG(ERR, "RxQ cnt %d > CONFIG_RTE_ETHDEV_QUEUE_STAT_CNTRS %d\n", @@ -2126,7 +2130,7 @@ bnxt_txq_info_get_op(struct rte_eth_dev *dev, uint16_t queue_id, qinfo->conf.tx_deferred_start = txq->tx_deferred_start; } -static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu) +int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu) { struct bnxt *bp = eth_dev->data->dev_private; uint32_t new_pkt_size; @@ -2137,6 +2141,10 @@ static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu) if (rc) return rc; + /* Exit if receive queues are not configured yet */ + if (!eth_dev->data->nb_rx_queues) + return rc; + new_pkt_size = new_mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + VLAN_TAG_SIZE * BNXT_NUM_VLANS; @@ -2167,7 +2175,9 @@ static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu) bp->flags &= ~BNXT_FLAG_JUMBO; } - eth_dev->data->dev_conf.rxmode.max_rx_pkt_len = new_pkt_size; + /* Is there a change in mtu setting? */ + if (eth_dev->data->dev_conf.rxmode.max_rx_pkt_len == new_pkt_size) + return rc; for (i = 0; i < bp->nr_vnics; i++) { struct bnxt_vnic_info *vnic = &bp->vnic_info[i]; @@ -2188,6 +2198,9 @@ static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu) } } + if (!rc) + eth_dev->data->dev_conf.rxmode.max_rx_pkt_len = new_pkt_size; + PMD_DRV_LOG(INFO, "New MTU is %d\n", new_mtu); return rc; diff --git a/drivers/net/bnxt/bnxt_rxq.c b/drivers/net/bnxt/bnxt_rxq.c index e1ed360eff..d55adc33ac 100644 --- a/drivers/net/bnxt/bnxt_rxq.c +++ b/drivers/net/bnxt/bnxt_rxq.c @@ -366,6 +366,10 @@ int bnxt_rx_queue_setup_op(struct rte_eth_dev *eth_dev, eth_dev->data->rx_queue_state[queue_idx] = queue_state; rte_spinlock_init(&rxq->lock); + /* Configure mtu if it is different from what was configured before */ + if (!queue_idx) + bnxt_mtu_set_op(eth_dev, eth_dev->data->mtu); + out: return rc; } -- 2.20.1