intel-iommu: Fix off-by-one in RMRR setup
We were mapping an extra byte (and hence usually an extra page): iommu_prepare_identity_map() expects to be given an 'end' argument which is the last byte to be mapped; not the first byte *not* to be mapped. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -2147,7 +2147,7 @@ static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr,
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if (pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO)
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return 0;
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return iommu_prepare_identity_map(pdev, rmrr->base_address,
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rmrr->end_address + 1);
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rmrr->end_address);
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}
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#ifdef CONFIG_DMAR_FLOPPY_WA
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@ -2161,7 +2161,7 @@ static inline void iommu_prepare_isa(void)
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return;
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printk(KERN_INFO "IOMMU: Prepare 0-16MiB unity mapping for LPC\n");
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ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024);
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ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024 - 1);
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if (ret)
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printk(KERN_ERR "IOMMU: Failed to create 0-16MiB identity map; "
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