intel-iommu: Mask physical address to correct page size in intel_map_single()
The physical address passed to domain_pfn_mapping() should be rounded down to the start of the MM page, not the VT-d page. This issue causes kernel panic on PAGE_SIZE>VTD_PAGE_SIZE platforms e.g. ia64 platforms. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -2551,6 +2551,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
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int prot = 0;
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int ret;
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struct intel_iommu *iommu;
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unsigned long paddr_pfn = paddr >> PAGE_SHIFT;
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BUG_ON(dir == DMA_NONE);
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@ -2585,7 +2586,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
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* is not a big problem
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*/
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ret = domain_pfn_mapping(domain, mm_to_dma_pfn(iova->pfn_lo),
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paddr >> VTD_PAGE_SHIFT, size, prot);
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mm_to_dma_pfn(paddr_pfn), size, prot);
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if (ret)
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goto error;
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