From bb2b7ffbc4e25b0c4839317b6c31cb768efe8b1f Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 23 Aug 2016 15:59:15 +0200 Subject: [PATCH] iommu/s390: simplify registration of I/O address translation parameters When a new function is attached to an iommu domain we need to register I/O address translation parameters. Since commit 69eea95c ("s390/pci_dma: fix DMA table corruption with > 4 TB main memory") start_dma and end_dma correctly describe the range of usable I/O addresses. Simplify the code by using these values directly. Signed-off-by: Sebastian Ott Reviewed-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky --- drivers/iommu/s390-iommu.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c index a04d491cf431..3b44b1d82f3b 100644 --- a/drivers/iommu/s390-iommu.c +++ b/drivers/iommu/s390-iommu.c @@ -101,8 +101,7 @@ static int s390_iommu_attach_device(struct iommu_domain *domain, zpci_dma_exit_device(zdev); zdev->dma_table = s390_domain->dma_table; - rc = zpci_register_ioat(zdev, 0, zdev->start_dma + PAGE_OFFSET, - zdev->start_dma + zdev->iommu_size - 1, + rc = zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma, (u64) zdev->dma_table); if (rc) goto out_restore;