block, nvme: remove unused dma_iova_state function parameter

DMA IOVA state is not used inside blk_rq_dma_map_iter_next, get
rid of the argument.

Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: nj-shetty

block/blk-mq-dma.c

@@ -238,7 +238,6 @@ EXPORT_SYMBOL_GPL(blk_rq_dma_map_iter_start);
  * blk_rq_dma_map_iter_next - map the next DMA segment for a request
  * @req:	request to map
  * @dma_dev:	device to map to
- * @state:	DMA IOVA state
  * @iter:	block layer DMA iterator
  *
  * Iterate to the next mapping after a previous call to
@@ -253,7 +252,7 @@ EXPORT_SYMBOL_GPL(blk_rq_dma_map_iter_start);
  * returned in @iter.status.
  */
 bool blk_rq_dma_map_iter_next(struct request *req, struct device *dma_dev,
-		struct dma_iova_state *state, struct blk_dma_iter *iter)
+		struct blk_dma_iter *iter)
 {
 	struct phys_vec vec;
 

drivers/nvme/host/pci.c

@@ -823,7 +823,7 @@ static bool nvme_pci_prp_iter_next(struct request *req, struct device *dma_dev,
 
 	if (iter->len)
 		return true;
-	if (!blk_rq_dma_map_iter_next(req, dma_dev, &iod->dma_state, iter))
+	if (!blk_rq_dma_map_iter_next(req, dma_dev, iter))
 		return false;
 	if (!dma_use_iova(&iod->dma_state) && dma_need_unmap(dma_dev)) {
 		iod->dma_vecs[iod->nr_dma_vecs].addr = iter->addr;
@@ -1010,8 +1010,7 @@ static blk_status_t nvme_pci_setup_data_sgl(struct request *req,
 		}
 		nvme_pci_sgl_set_data(&sg_list[mapped++], iter);
 		iod->total_len += iter->len;
-	} while (blk_rq_dma_map_iter_next(req, nvmeq->dev->dev, &iod->dma_state,
-				iter));
+	} while (blk_rq_dma_map_iter_next(req, nvmeq->dev->dev, iter));
 
 	nvme_pci_sgl_set_seg(&iod->cmd.common.dptr.sgl, sgl_dma, mapped);
 	if (unlikely(iter->status))

include/linux/blk-mq-dma.h

@@ -28,7 +28,7 @@ struct blk_dma_iter {
 bool blk_rq_dma_map_iter_start(struct request *req, struct device *dma_dev,
 		struct dma_iova_state *state, struct blk_dma_iter *iter);
 bool blk_rq_dma_map_iter_next(struct request *req, struct device *dma_dev,
-		struct dma_iova_state *state, struct blk_dma_iter *iter);
+		struct blk_dma_iter *iter);
 
 /**
  * blk_rq_dma_map_coalesce - were all segments coalesced?