175 	u32 rd_idx, rem, slots;  in mei_dma_ring_read()  local
186 	rd_idx = READ_ONCE(ctrl->dbuf_rd_idx) & (dbuf_depth - 1);  in mei_dma_ring_read()
193 	if (rd_idx + slots > dbuf_depth) {  in mei_dma_ring_read()
194 		buf += mei_dma_copy_from(dev, buf, rd_idx, dbuf_depth - rd_idx);  in mei_dma_ring_read()
195 		rem = slots - (dbuf_depth - rd_idx);  in mei_dma_ring_read()
196 		rd_idx = 0;  in mei_dma_ring_read()
201 	mei_dma_copy_from(dev, buf, rd_idx, rem);  in mei_dma_ring_read()
220 	u32 wr_idx, rd_idx, hbuf_depth, empty;  in mei_dma_ring_empty_slots()  local
230 	rd_idx = READ_ONCE(ctrl->hbuf_rd_idx);  in mei_dma_ring_empty_slots()
233 	if (rd_idx > wr_idx)  in mei_dma_ring_empty_slots()
234 		empty = rd_idx - wr_idx;  in mei_dma_ring_empty_slots()
236 		empty = hbuf_depth - (wr_idx - rd_idx);  in mei_dma_ring_empty_slots()