Hi Stephen
From: Stephen Hemminger
> mlx4_dev_info_get calls mlx4_get_ifname, but mlx4_get_ifname uses priv-
> >ctx which is not a valid pointer in a secondary process. The fix is to cache
> >the
> value in primary.
>
> In the primary process, get and store the interface index of the device so
> that secondary process can see it.
>
> Bugzilla ID:320
> Fixes: 61cbdd419478 ("net/mlx4: separate device control functions")
> Cc: sta...@dpdk.org
> Reported-by: Suyang Ju <s...@paloaltonetworks.com>
> Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
Acked-by: Matan Azrad <ma...@mellanox.com>
Thanks for the fix.
> ---
> drivers/net/mlx4/mlx4.c | 19 +++++++++----------
> drivers/net/mlx4/mlx4.h | 1 +
> drivers/net/mlx4/mlx4_ethdev.c | 4 +---
> 3 files changed, 11 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c index
> 2e169b0887a7..bab2cadbe519 100644
> --- a/drivers/net/mlx4/mlx4.c
> +++ b/drivers/net/mlx4/mlx4.c
> @@ -763,6 +763,7 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct
> rte_pci_device *pci_dev)
> };
> unsigned int vf;
> int i;
> + char ifname[IF_NAMESIZE];
>
> (void)pci_drv;
> err = mlx4_init_once();
> @@ -1002,17 +1003,15 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv,
> struct rte_pci_device *pci_dev)
> mac.addr_bytes[4], mac.addr_bytes[5]);
> /* Register MAC address. */
> priv->mac[0] = mac;
> -#ifndef NDEBUG
> - {
> - char ifname[IF_NAMESIZE];
> -
> - if (mlx4_get_ifname(priv, &ifname) == 0)
> - DEBUG("port %u ifname is \"%s\"",
> - priv->port, ifname);
> - else
> - DEBUG("port %u ifname is unknown", priv-
> >port);
> +
> + if (mlx4_get_ifname(priv, &ifname) == 0) {
> + DEBUG("port %u ifname is \"%s\"",
> + priv->port, ifname);
> + priv->if_index = if_nametoindex(ifname);
> + } else {
> + DEBUG("port %u ifname is unknown", priv->port);
> }
> -#endif
> +
> /* Get actual MTU if possible. */
> mlx4_mtu_get(priv, &priv->mtu);
> DEBUG("port %u MTU is %u", priv->port, priv->mtu); diff --git
> a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h index
> cd0d637ac2bf..81b529ee8030 100644
> --- a/drivers/net/mlx4/mlx4.h
> +++ b/drivers/net/mlx4/mlx4.h
> @@ -159,6 +159,7 @@ struct mlx4_priv {
> struct ibv_device_attr device_attr; /**< Device properties. */
> struct ibv_pd *pd; /**< Protection Domain. */
> /* Device properties. */
> + unsigned int if_index; /**< Associated network device index */
> uint16_t mtu; /**< Configured MTU. */
> uint8_t port; /**< Physical port number. */
> uint32_t started:1; /**< Device started, flows enabled. */ diff --git
> a/drivers/net/mlx4/mlx4_ethdev.c b/drivers/net/mlx4/mlx4_ethdev.c index
> ceef921620a8..5d28c0116d21 100644
> --- a/drivers/net/mlx4/mlx4_ethdev.c
> +++ b/drivers/net/mlx4/mlx4_ethdev.c
> @@ -616,7 +616,6 @@ mlx4_dev_infos_get(struct rte_eth_dev *dev, struct
> rte_eth_dev_info *info) {
> struct mlx4_priv *priv = dev->data->dev_private;
> unsigned int max;
> - char ifname[IF_NAMESIZE];
>
> /* FIXME: we should ask the device for these values. */
> info->min_rx_bufsize = 32;
> @@ -637,8 +636,7 @@ mlx4_dev_infos_get(struct rte_eth_dev *dev, struct
> rte_eth_dev_info *info)
> info->rx_queue_offload_capa = mlx4_get_rx_queue_offloads(priv);
> info->rx_offload_capa = (mlx4_get_rx_port_offloads(priv) |
> info->rx_queue_offload_capa);
> - if (mlx4_get_ifname(priv, &ifname) == 0)
> - info->if_index = if_nametoindex(ifname);
> + info->if_index = priv->if_index;
> info->hash_key_size = MLX4_RSS_HASH_KEY_SIZE;
> info->speed_capa =
> ETH_LINK_SPEED_1G |
> --
> 2.20.1
