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nvme/pci: Use req_op to determine DIF remapping 

Only read and write commands need DIF remapping. Everything else uses
a passthrough integrity payload.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Keith Busch 2017-08-29 17:46:02 -04:00 committed by Christoph Hellwig
parent 1cad65620f
commit b5d8af5b52
1 changed files with 2 additions and 2 deletions
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4
drivers/nvme/host/pci.c
View File

@ -668,7 +668,7 @@ static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req,
if (blk_rq_map_integrity_sg(q, req->bio, &iod->meta_sg) != 1) if (blk_rq_map_integrity_sg(q, req->bio, &iod->meta_sg) != 1)
goto out_unmap; goto out_unmap;
if (rq_data_dir(req)) if (req_op(req) == REQ_OP_WRITE)
nvme_dif_remap(req, nvme_dif_prep); nvme_dif_remap(req, nvme_dif_prep);
if (!dma_map_sg(dev->dev, &iod->meta_sg, 1, dma_dir)) if (!dma_map_sg(dev->dev, &iod->meta_sg, 1, dma_dir))
@ -696,7 +696,7 @@ static void nvme_unmap_data(struct nvme_dev *dev, struct request *req)
if (iod->nents) { if (iod->nents) {
dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir); dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir);
if (blk_integrity_rq(req)) { if (blk_integrity_rq(req)) {
if (!rq_data_dir(req)) if (req_op(req) == REQ_OP_READ)
nvme_dif_remap(req, nvme_dif_complete); nvme_dif_remap(req, nvme_dif_complete);
dma_unmap_sg(dev->dev, &iod->meta_sg, 1, dma_dir); dma_unmap_sg(dev->dev, &iod->meta_sg, 1, dma_dir);
} }