237 	return (ring->nr_slots - ring->used_slots);  in free_slots()
288 	ring->used_slots++;  in request_slot()
290 	update_max_used_slots(ring, ring->used_slots);  in request_slot()
618 	ring->used_slots = ring->nr_slots;  in alloc_initial_descbuffers()
745 	if (!ring->used_slots)  in free_all_descbuffers()
1155 	old_used_slots = ring->used_slots;  in dma_tx_fragment()
1168 		ring->used_slots = old_used_slots;  in dma_tx_fragment()
1176 		ring->used_slots = old_used_slots;  in dma_tx_fragment()
1196 			ring->used_slots = old_used_slots;  in dma_tx_fragment()
1208 			ring->used_slots = old_used_slots;  in dma_tx_fragment()
1414 		ring->used_slots--;  in b43_dma_handle_txstatus()
1445 		stats[i].len = ring->used_slots / SLOTS_PER_PACKET;  in b43_dma_get_tx_stats()
1532 	int used_slots = 0;  in b43_dma_rx()  local
1541 		update_max_used_slots(ring, ++used_slots);  in b43_dma_rx()