nvme-fc: Use rq_dma_dir macro

Remove code duplication.
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>

drivers/nvme/host/fc.c

@@ -2108,7 +2108,6 @@ nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq,
 		struct nvme_fc_fcp_op *op)
 {
 	struct nvmefc_fcp_req *freq = &op->fcp_req;
-	enum dma_data_direction dir;
 	int ret;
 
 	freq->sg_cnt = 0;
@@ -2125,9 +2124,8 @@ nvme_fc_map_data(struct nvme_fc_ctrl *ctrl, struct request *rq,
 
 	op->nents = blk_rq_map_sg(rq->q, rq, freq->sg_table.sgl);
 	WARN_ON(op->nents > blk_rq_nr_phys_segments(rq));
-	dir = (rq_data_dir(rq) == WRITE) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 	freq->sg_cnt = fc_dma_map_sg(ctrl->lport->dev, freq->sg_table.sgl,
-				op->nents, dir);
+				op->nents, rq_dma_dir(rq));
 	if (unlikely(freq->sg_cnt <= 0)) {
 		sg_free_table_chained(&freq->sg_table, SG_CHUNK_SIZE);
 		freq->sg_cnt = 0;
@@ -2150,8 +2148,7 @@ nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq,
 		return;
 
 	fc_dma_unmap_sg(ctrl->lport->dev, freq->sg_table.sgl, op->nents,
-				((rq_data_dir(rq) == WRITE) ?
-					DMA_TO_DEVICE : DMA_FROM_DEVICE));
+			rq_dma_dir(rq));
 
 	nvme_cleanup_cmd(rq);