[brussels-dev] code review: mac prop handle

[Artem Kachitchkine]

>         if ((dip = ddi_hold_devi_by_instance(major, ddi_instance, 0)) == NULL)
>                 return (EINVAL);

Well from the DDI/NDI point of view, this is not a very nice thing to do 
generally, in most cases there are better ways (though not necessarily 
easier) to achieve the same result. I don't know if it applies to this 
case, needs more review.

-Artem