Index: head/sys/mips/mediatek/mtk_xhci.c
===================================================================
--- head/sys/mips/mediatek/mtk_xhci.c
+++ head/sys/mips/mediatek/mtk_xhci.c
@@ -99,7 +99,6 @@
 	sc->sc_bus.parent = self;
 	sc->sc_bus.devices = sc->sc_devices;
 	sc->sc_bus.devices_max = XHCI_MAX_DEVICES;
-	sc->sc_bus.dma_bits = 32;
 
 	rid = 0;
 	sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,