27/05/2021 15:37, Xueming Li:

+static const struct {
+	const char *name;
+	unsigned int drv_class;
+} mlx5_classes[] = {
+	{ .name = "vdpa", .drv_class = MLX5_CLASS_VDPA },
+	{ .name = "net", .drv_class = MLX5_CLASS_NET },
+	{ .name = "regex", .drv_class = MLX5_CLASS_REGEX },
+	{ .name = "compress", .drv_class = MLX5_CLASS_COMPRESS },
+};

The class name should be "eth", not "net".
This is the standard in rte_ethdev.c:
	rte_class_find_by_name("eth")