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AMD IOMMU: fix detection of NP capable IOMMUs

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This patch changes the code to use IOMMU_CAP_NPCACHE as a shift and not
as a mask.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-10-30 17:43:57 +01:00
parent 1e19b16a30
commit ae9b940364
1 changed files with 1 additions and 1 deletions
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arch/x86/kernel/amd_iommu.c
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@ -50,7 +50,7 @@ static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
/* returns !0 if the IOMMU is caching non-present entries in its TLB */ /* returns !0 if the IOMMU is caching non-present entries in its TLB */
static int iommu_has_npcache(struct amd_iommu *iommu) static int iommu_has_npcache(struct amd_iommu *iommu)
{ {
return iommu->cap & IOMMU_CAP_NPCACHE; return iommu->cap & (1UL << IOMMU_CAP_NPCACHE);
} }
/**************************************************************************** /****************************************************************************