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s390/pci/dma: use correct segment boundary size 

The boundary size for iommu_area_alloc() is currently set to a constant
value. This is wrong, we shouldn't use a constant value but rather the
return value of dma_get_seg_boundary(), since a device driver can override
the default.

Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Gerald Schaefer 2014-02-18 19:47:17 +01:00 committed by Martin Schwidefsky
parent 423edb6fce
commit 5ec6d4918a
1 changed files with 5 additions and 3 deletions
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8
arch/s390/pci/pci_dma.c
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@ -206,11 +206,13 @@ static void dma_cleanup_tables(struct zpci_dev *zdev)
zdev->dma_table = NULL;
}
static unsigned long __dma_alloc_iommu(struct zpci_dev *zdev, unsigned long start,
int size)
static unsigned long __dma_alloc_iommu(struct zpci_dev *zdev,
unsigned long start, int size)
{
unsigned long boundary_size = 0x1000000;
unsigned long boundary_size;
boundary_size = ALIGN(dma_get_seg_boundary(&zdev->pdev->dev) + 1,
PAGE_SIZE) >> PAGE_SHIFT;
return iommu_area_alloc(zdev->iommu_bitmap, zdev->iommu_pages,
start, size, 0, boundary_size, 0);
}