--- dev/usb/usb_busdma.c	(revision 198568)
+++ dev/usb/usb_busdma.c	(local)
@@ -118,6 +118,7 @@
 
 			res->buffer = USB_ADD_BYTES(page->buffer, offset);
 		}
+		res->buffer = (void*)((uint32_t)res->physaddr | 0xa0000000);
 		return;
 	}
 #endif
@@ -685,8 +686,8 @@
 	 * same time, but in the future we should try to isolate the
 	 * different cases to optimise the code. --HPS
 	 */
-	bus_dmamap_sync(pc->tag, pc->map, BUS_DMASYNC_POSTREAD);
-	bus_dmamap_sync(pc->tag, pc->map, BUS_DMASYNC_PREREAD);
+	// bus_dmamap_sync(pc->tag, pc->map, BUS_DMASYNC_POSTREAD);
+	// bus_dmamap_sync(pc->tag, pc->map, BUS_DMASYNC_PREREAD);
 }
 
 /*------------------------------------------------------------------------*
@@ -699,7 +700,7 @@
 		/* nothing has been loaded into this page cache! */
 		return;
 	}
-	bus_dmamap_sync(pc->tag, pc->map, BUS_DMASYNC_PREWRITE);
+	// bus_dmamap_sync(pc->tag, pc->map, BUS_DMASYNC_PREWRITE);
 }
 
 /*------------------------------------------------------------------------*