[PATCH v2 2/3] net/mlx5: fix vport metadata for auxiliary bus devices

[Max Tottenham]

Query switch info in auxiliary probe path to properly identify
SF representors. Without this, esw_mode stays 0 and vport
metadata is never initialized for hotplugged SFs.

Fixes: 919488fbfa ("net/mlx5: support Sub-Function")
Signed-off-by: Max Tottenham <mtottenh at akamai.com>
---
 drivers/net/mlx5/linux/mlx5_os.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index 7f73183bb1..ec96d11b26 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -2970,6 +2970,21 @@ mlx5_os_auxiliary_probe(struct mlx5_common_device *cdev,
 	}
 	spawn.ifindex = ret;
 	spawn.cdev = cdev;
+	/*
+	 * Query switch info for SF representors (like PCI probe does).
+	 * Without this, esw_mode stays 0 and vport metadata is never
+	 * initialized for hotplugged SFs.
+	 */
+	if (spawn.ifindex > 0) {
+		ret = mlx5_sysfs_switch_info(spawn.ifindex, &spawn.info);
+		if (ret) {
+			DRV_LOG(DEBUG, "No switch info for ifindex %d, assuming non-representor",
+				spawn.ifindex);
+			/* Not an error - device may not be a representor */
+			ret = 0;
+		}
+	}
+
 	/* Spawn device. */
 	eth_dev = mlx5_dev_spawn(dev, &spawn, &eth_da, mkvlist);
 	if (eth_dev == NULL)
-- 
2.52.0