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nvme: meta_sg doesn't have to be an array 

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2015-10-26 17:12:51 +09:00 committed by Jens Axboe
parent eee417b069
commit bf68405705
1 changed files with 6 additions and 6 deletions
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12
drivers/nvme/host/pci.c
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@ -174,7 +174,7 @@ struct nvme_iod {
int nents; /* Used in scatterlist */
int length; /* Of data, in bytes */
dma_addr_t first_dma;
struct scatterlist meta_sg[1]; /* metadata requires single contiguous buffer */
struct scatterlist meta_sg; /* metadata requires single contiguous buffer */
struct scatterlist sg[0];
};
@ -594,21 +594,21 @@ static int nvme_map_data(struct nvme_dev *dev, struct nvme_iod *iod,
if (blk_rq_count_integrity_sg(q, req->bio) != 1)
goto out_unmap;
sg_init_table(iod->meta_sg, 1);
if (blk_rq_map_integrity_sg(q, req->bio, iod->meta_sg) != 1)
sg_init_table(&iod->meta_sg, 1);
if (blk_rq_map_integrity_sg(q, req->bio, &iod->meta_sg) != 1)
goto out_unmap;
if (rq_data_dir(req))
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))
goto out_unmap;
}
cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
cmnd->rw.prp2 = cpu_to_le64(iod->first_dma);
if (blk_integrity_rq(req))
cmnd->rw.metadata = cpu_to_le64(sg_dma_address(iod->meta_sg));
cmnd->rw.metadata = cpu_to_le64(sg_dma_address(&iod->meta_sg));
return BLK_MQ_RQ_QUEUE_OK;
out_unmap:
@ -628,7 +628,7 @@ static void nvme_unmap_data(struct nvme_dev *dev, struct nvme_iod *iod)
if (blk_integrity_rq(req)) {
if (!rq_data_dir(req))
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);
}
}