Comment 34 for bug 1313904

snd_hda_get_sub_nodes(struct hda_codec *codec, hda_nid_t nid,
      hda_nid_t *start_id)
 {
  unsigned int parm;

 parm = snd_hda_param_read(codec, nid, AC_PAR_NODE_COUNT);
  if (parm == -1)
   return 0;

 *start_id = (parm >> 16) & 0x7fff;

/* this mean we need to fix the return value param when codec is vt1802 and nid is functional group */

  return (int)(parm & 0x7fff);
 }