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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>
hifive-unleashed-5.1
David Woodhouse 2011-05-31 00:22:52 +01:00
parent 8519dc4401
commit 70e535d1e5
1 changed files with 2 additions and 2 deletions
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4
drivers/pci/intel-iommu.c
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@ -2147,7 +2147,7 @@ static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr,
if (pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO)
return 0;
return iommu_prepare_identity_map(pdev, rmrr->base_address,
rmrr->end_address + 1);
rmrr->end_address);
}
#ifdef CONFIG_DMAR_FLOPPY_WA
@ -2161,7 +2161,7 @@ static inline void iommu_prepare_isa(void)
return;
printk(KERN_INFO "IOMMU: Prepare 0-16MiB unity mapping for LPC\n");
ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024);
ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024 - 1);
if (ret)
printk(KERN_ERR "IOMMU: Failed to create 0-16MiB identity map; "