diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -1770,13 +1770,13 @@
 
 /* Allocate an IO port or memory resource, given its GAS. */
 int
-acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
+acpi_bus_alloc_gas(device_t dev, int *type, int rid, ACPI_GENERIC_ADDRESS *gas,
     struct resource **res, u_int flags)
 {
     int error, res_type;
 
     error = ENOMEM;
-    if (type == NULL || rid == NULL || gas == NULL || res == NULL)
+    if (type == NULL || gas == NULL || res == NULL)
 	return (EINVAL);
 
     /* We only support memory and IO spaces. */
@@ -1802,14 +1802,14 @@
     if (gas->Address == 0 || gas->BitWidth == 0)
 	return (EINVAL);
 
-    bus_set_resource(dev, res_type, *rid, gas->Address,
+    bus_set_resource(dev, res_type, rid, gas->Address,
 	gas->BitWidth / 8);
     *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
     if (*res != NULL) {
 	*type = res_type;
 	error = 0;
     } else
-	bus_delete_resource(dev, res_type, *rid);
+	bus_delete_resource(dev, res_type, rid);
 
     return (error);
 }
diff --git a/sys/dev/acpica/acpi_apei.c b/sys/dev/acpica/acpi_apei.c
--- a/sys/dev/acpica/acpi_apei.c
+++ b/sys/dev/acpica/acpi_apei.c
@@ -700,7 +700,7 @@
 	rid = 0;
 	TAILQ_FOREACH(ge, &sc->ges, link) {
 		ge->res_rid = rid++;
-		acpi_bus_alloc_gas(dev, &ge->res_type, &ge->res_rid,
+		acpi_bus_alloc_gas(dev, &ge->res_type, ge->res_rid,
 		    &ge->v1.ErrorStatusAddress, &ge->res, 0);
 		if (ge->res) {
 			ge->buf = pmap_mapdev_attr(READ8(ge->res, 0),
@@ -710,7 +710,7 @@
 		}
 		if (ge->v1.Header.Type == ACPI_HEST_TYPE_GENERIC_ERROR_V2) {
 			ge->res2_rid = rid++;
-			acpi_bus_alloc_gas(dev, &ge->res2_type, &ge->res2_rid,
+			acpi_bus_alloc_gas(dev, &ge->res2_type, ge->res2_rid,
 			    &ge->v2.ReadAckRegister, &ge->res2, RF_SHAREABLE);
 			if (ge->res2 == NULL)
 				device_printf(dev, "Can't allocate ack resource.\n");
diff --git a/sys/dev/acpica/acpi_cpu.c b/sys/dev/acpica/acpi_cpu.c
--- a/sys/dev/acpica/acpi_cpu.c
+++ b/sys/dev/acpica/acpi_cpu.c
@@ -732,7 +732,7 @@
     if (AcpiGbl_FADT.C2Latency <= 100) {
 	gas.Address = sc->cpu_p_blk + 4;
 	cx_ptr->res_rid = 0;
-	acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &cx_ptr->res_rid,
+	acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, cx_ptr->res_rid,
 	    &gas, &cx_ptr->p_lvlx, RF_SHAREABLE);
 	if (cx_ptr->p_lvlx != NULL) {
 	    cx_ptr->type = ACPI_STATE_C2;
@@ -749,7 +749,7 @@
     if (AcpiGbl_FADT.C3Latency <= 1000 && !(cpu_quirks & CPU_QUIRK_NO_C3)) {
 	gas.Address = sc->cpu_p_blk + 5;
 	cx_ptr->res_rid = 1;
-	acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, &cx_ptr->res_rid,
+	acpi_bus_alloc_gas(sc->cpu_dev, &cx_ptr->res_type, cx_ptr->res_rid,
 	    &gas, &cx_ptr->p_lvlx, RF_SHAREABLE);
 	if (cx_ptr->p_lvlx != NULL) {
 	    cx_ptr->type = ACPI_STATE_C3;
diff --git a/sys/dev/acpica/acpi_package.c b/sys/dev/acpica/acpi_package.c
--- a/sys/dev/acpica/acpi_package.c
+++ b/sys/dev/acpica/acpi_package.c
@@ -126,7 +126,7 @@
 
     memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas));
 
-    return (acpi_bus_alloc_gas(dev, type, rid, &gas, dst, flags));
+    return (acpi_bus_alloc_gas(dev, type, *rid, &gas, dst, flags));
 }
 
 int
diff --git a/sys/dev/acpica/acpi_throttle.c b/sys/dev/acpica/acpi_throttle.c
--- a/sys/dev/acpica/acpi_throttle.c
+++ b/sys/dev/acpica/acpi_throttle.c
@@ -275,7 +275,7 @@
 			return (ENXIO);
 		}
 		memcpy(&gas, obj.Buffer.Pointer + 3, sizeof(gas));
-		acpi_bus_alloc_gas(sc->cpu_dev, &sc->cpu_p_type, &thr_rid,
+		acpi_bus_alloc_gas(sc->cpu_dev, &sc->cpu_p_type, thr_rid,
 		    &gas, &sc->cpu_p_cnt, 0);
 		if (sc->cpu_p_cnt != NULL && bootverbose) {
 			device_printf(sc->cpu_dev, "P_CNT from _PTC %#jx\n",
@@ -295,7 +295,7 @@
 		gas.Address = sc->cpu_p_blk;
 		gas.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO;
 		gas.BitWidth = 32;
-		acpi_bus_alloc_gas(sc->cpu_dev, &sc->cpu_p_type, &thr_rid,
+		acpi_bus_alloc_gas(sc->cpu_dev, &sc->cpu_p_type, thr_rid,
 		    &gas, &sc->cpu_p_cnt, 0);
 		if (sc->cpu_p_cnt != NULL) {
 			if (bootverbose)
diff --git a/sys/dev/acpica/acpivar.h b/sys/dev/acpica/acpivar.h
--- a/sys/dev/acpica/acpivar.h
+++ b/sys/dev/acpica/acpivar.h
@@ -419,7 +419,7 @@
 ACPI_STATUS	acpi_Startup(void);
 void		acpi_UserNotify(const char *subsystem, ACPI_HANDLE h,
 		    uint8_t notify);
-int		acpi_bus_alloc_gas(device_t dev, int *type, int *rid,
+int		acpi_bus_alloc_gas(device_t dev, int *type, int rid,
 		    ACPI_GENERIC_ADDRESS *gas, struct resource **res,
 		    u_int flags);
 void		acpi_walk_subtables(void *first, void *end,
diff --git a/sys/dev/wdatwd/wdatwd.c b/sys/dev/wdatwd/wdatwd.c
--- a/sys/dev/wdatwd/wdatwd.c
+++ b/sys/dev/wdatwd/wdatwd.c
@@ -612,7 +612,7 @@
 		int		type, rid = 0;
 		struct resource *res;
 
-		if (acpi_bus_alloc_gas(dev, &type, &rid,
+		if (acpi_bus_alloc_gas(dev, &type, rid,
 		    &((ACPI_WDAT_ENTRY *)(wdat + 1))->RegisterRegion,
 		    &res, 0))
 			return (ENXIO);