941 	if (sdev->unit)  in ataclear()
942 		free(sdev->unit);  in ataclear()
1674 	SDunit *unit;  in atario()  local
1678 	unit = r->unit;  in atario()
1679 	if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil){  in atario()
1683 	drive = ctlr->drive[unit->subno];  in atario()
1727 				unit->name, drive->dmactl, drive->rwmctl);  in atario()
2233 atarctl(SDunit* unit, char* p, int l)  in atarctl()  argument
2239 	if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil)  in atarctl()
2241 	drive = ctlr->drive[unit->subno];  in atarctl()
2272 atawctl(SDunit* unit, Cmdbuf* cb)  in atawctl()  argument
2278 	if((ctlr = unit->dev->ctlr) == nil || ctlr->drive[unit->subno] == nil)  in atawctl()
2280 	drive = ctlr->drive[unit->subno];  in atawctl()