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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 <sebott@linux.vnet.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2016-08-23 15:59:15 +02:00 committed by Martin Schwidefsky
parent dcc096c540
commit bb2b7ffbc4
1 changed files with 1 additions and 2 deletions
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3
drivers/iommu/s390-iommu.c
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@ -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;