LM_MEDIUM_TYPE_NULL
if(GET_MEDIUM_TYPE(req_medium) != LM_MEDIUM_TYPE_NULL)
SET_MEDIUM_TYPE(pdev->vars.medium, LM_MEDIUM_TYPE_NULL);
req_medium = LM_MEDIUM_TYPE_NULL;
case LM_MEDIUM_TYPE_NULL:
if(GET_MEDIUM_TYPE(medium) == LM_MEDIUM_TYPE_NULL)
case LM_MEDIUM_TYPE_NULL:
LM_MEDIUM_TYPE_NULL |
return LM_MEDIUM_TYPE_NULL;
return LM_MEDIUM_TYPE_NULL;