diff --git a/sys/dev/hptiop/hptiop.c b/sys/dev/hptiop/hptiop.c
--- a/sys/dev/hptiop/hptiop.c
+++ b/sys/dev/hptiop/hptiop.c
@@ -166,7 +166,7 @@
 };
 
 #define hba_from_dev(dev) \
-	((struct hpt_iop_hba *)devclass_get_softc(hptiop_devclass, dev2unit(dev)))
+	((struct hpt_iop_hba *)((dev)->si_drv1))
 
 #define BUS_SPACE_WRT4_ITL(offset, value) bus_space_write_4(hba->bar0t,\
 		hba->bar0h, offsetof(struct hpt_iopmu_itl, offset), (value))
@@ -1870,6 +1870,7 @@
 
 static int hptiop_attach(device_t dev)
 {
+	struct make_dev_args args;
 	struct hpt_iop_hba *hba = (struct hpt_iop_hba *)device_get_softc(dev);
 	struct hpt_iop_request_get_config  iop_config;
 	struct hpt_iop_request_set_config  set_config;
@@ -2068,10 +2069,14 @@
 	hba->ops->enable_intr(hba);
 	hba->initialized = 1;
 
-	hba->ioctl_dev = make_dev(&hptiop_cdevsw, unit,
-				UID_ROOT, GID_WHEEL /*GID_OPERATOR*/,
-				S_IRUSR | S_IWUSR, "%s%d", driver_name, unit);
+	make_dev_args_init(&args);
+	args.mda_devsw = &hptiop_cdevsw;
+	args.mda_uid = UID_ROOT;
+	args.mda_gid = GID_WHEEL /*GID_OPERATOR*/;
+	args.mda_mode = S_IRUSR | S_IWUSR;
+	args.mda_si_drv1 = hba;
 
+	make_dev_s(&args, &hba->ioctl_dev, "%s%d", driver_name, unit);
 
 	return 0;