net/mlx5: fix find sibling devices

The routine mlx5_eth_find_next() and related iterating macro
MLX5_ETH_FOREACH_DEV is used to iterate through sibling devices (all
representors share the same configuration and switching domain) on top
of specified root device.

The root device parameter was specified as NULL, and it caused
missing siblings in iteration during representor device probing,
causing:

1. allocating new domain_id for the device being probed.
2. discrepancy in representor configurations and potential overall
   driver malfunctions.

Fixes: 56bb3c84e982 ("net/mlx5: reduce PCI dependency")

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>

diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index eeeca27..5f8766a 100644 (file)
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -1314,7 +1314,7 @@ err_secondary:
        }
        /* Override some values set by hardware configuration. */
        mlx5_args(config, dpdk_dev->devargs);
-       err = mlx5_dev_check_sibling_config(priv, config);
+       err = mlx5_dev_check_sibling_config(priv, config, dpdk_dev);
        if (err)
                goto error;
        config->hw_csum = !!(sh->device_attr.device_cap_flags_ex &

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 90990ff..f84e061 100644 (file)
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -2297,7 +2297,8 @@ rte_pmd_mlx5_get_dyn_flag_names(char *names[], unsigned int n)
  */
 int
 mlx5_dev_check_sibling_config(struct mlx5_priv *priv,
-                             struct mlx5_dev_config *config)
+                             struct mlx5_dev_config *config,
+                             struct rte_device *dpdk_dev)
 {
        struct mlx5_dev_ctx_shared *sh = priv->sh;
        struct mlx5_dev_config *sh_conf = NULL;
@@ -2308,7 +2309,7 @@ mlx5_dev_check_sibling_config(struct mlx5_priv *priv,
        if (sh->refcnt == 1)
                return 0;
        /* Find the device with shared context. */
-       MLX5_ETH_FOREACH_DEV(port_id, NULL) {
+       MLX5_ETH_FOREACH_DEV(port_id, dpdk_dev) {
                struct mlx5_priv *opriv =
                        rte_eth_devices[port_id].data->dev_private;
 

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 34d66e9..e02714e 100644 (file)
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -1503,7 +1503,8 @@ void mlx5_set_min_inline(struct mlx5_dev_spawn_data *spawn,
                         struct mlx5_dev_config *config);
 void mlx5_set_metadata_mask(struct rte_eth_dev *dev);
 int mlx5_dev_check_sibling_config(struct mlx5_priv *priv,
-                                 struct mlx5_dev_config *config);
+                                 struct mlx5_dev_config *config,
+                                 struct rte_device *dpdk_dev);
 int mlx5_dev_configure(struct rte_eth_dev *dev);
 int mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info);
 int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size);

diff --git a/drivers/net/mlx5/windows/mlx5_os.c b/drivers/net/mlx5/windows/mlx5_os.c
index 5a18f53..5518bc3 100644 (file)
--- a/drivers/net/mlx5/windows/mlx5_os.c
+++ b/drivers/net/mlx5/windows/mlx5_os.c
@@ -430,7 +430,7 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
         * Look for sibling devices in order to reuse their switch domain
         * if any, otherwise allocate one.
         */
-       MLX5_ETH_FOREACH_DEV(port_id, NULL) {
+       MLX5_ETH_FOREACH_DEV(port_id, dpdk_dev) {
                const struct mlx5_priv *opriv =
                        rte_eth_devices[port_id].data->dev_private;