[PATCH] Revert "nvme-pci: clamp max_hw_sectors based on DMA optimized limitation"

[Christoph Hellwig]

This turns down to cause up to 15% performance regressions on standard
large transfer workloads.  Revert it and hope the IOVA allocator can
eventually be fixed to remove the need for the original workaround.

This reverts commit 3710e2b056cb92ad816e4d79fa54a6a5b6ad8cbd.

Signed-off-by: Christoph Hellwig <hch at lst.de>
---
 drivers/nvme/host/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 5440cf18b55b..82e308fe4f4c 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -3747,7 +3747,7 @@ static struct nvme_dev *nvme_pci_alloc_dev(struct pci_dev *pdev,
 	 */
 	dev->ctrl.max_hw_sectors = min_t(u32,
 			NVME_MAX_BYTES >> SECTOR_SHIFT,
-			dma_opt_mapping_size(&pdev->dev) >> 9);
+			dma_max_mapping_size(&pdev->dev) >> 9);
 	dev->ctrl.max_segments = NVME_MAX_SEGS;
 	dev->ctrl.max_integrity_segments = 1;
 	return dev;
-- 
2.53.0