ATL_PTD_OFFSET
if (ptd_offset == ATL_PTD_OFFSET) {
if (ptd_offset == ATL_PTD_OFFSET)
ptd_offset = ATL_PTD_OFFSET;
ptd_offset = ATL_PTD_OFFSET;
ptd_read(hcd, ATL_PTD_OFFSET, slot, &ptd);
ptd_read(hcd, ATL_PTD_OFFSET, slot, &ptd);