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AMD IOMMU: __unmap_single: check for bad_dma_address instead of 0

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Impact: minor fix

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-08 14:40:26 +01:00
parent 8ad909c4c1
commit b8d9905d02
1 changed files with 2 additions and 1 deletions
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3
arch/x86/kernel/amd_iommu.c
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@ -983,7 +983,8 @@ static void __unmap_single(struct amd_iommu *iommu,
dma_addr_t i, start;
unsigned int pages;
if ((dma_addr == 0) || (dma_addr + size > dma_dom->aperture_size))
if ((dma_addr == bad_dma_address) ||
(dma_addr + size > dma_dom->aperture_size))
return;
pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);