From: Tom Lyon Date: Mon, 17 May 2010 07:19:52 +0000 (+0100) Subject: intel-iommu: intel_iommu_map_range failed at very end of address space X-Git-Tag: firefly_0821_release~9833^2~2048^2~4 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8954da1f82a468deeeae3683252b5440e7f4ccbe;p=firefly-linux-kernel-4.4.55.git intel-iommu: intel_iommu_map_range failed at very end of address space intel_iommu_map_range() doesn't allow allocation at the very end of the address space; that code has been simplified and corrected. Signed-off-by: Tom Lyon Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse --- diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 57be89e6f484..65741dc491d6 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -3626,7 +3626,6 @@ static int intel_iommu_map_range(struct iommu_domain *domain, { struct dmar_domain *dmar_domain = domain->priv; u64 max_addr; - int addr_width; int prot = 0; int ret; @@ -3639,18 +3638,14 @@ static int intel_iommu_map_range(struct iommu_domain *domain, max_addr = iova + size; if (dmar_domain->max_addr < max_addr) { - int min_agaw; u64 end; /* check if minimum agaw is sufficient for mapped address */ - min_agaw = vm_domain_min_agaw(dmar_domain); - addr_width = agaw_to_width(min_agaw); - end = DOMAIN_MAX_ADDR(addr_width); - end = end & VTD_PAGE_MASK; + end = __DOMAIN_MAX_ADDR(dmar_domain->gaw) + 1; if (end < max_addr) { - printk(KERN_ERR "%s: iommu agaw (%d) is not " + printk(KERN_ERR "%s: iommu width (%d) is not " "sufficient for the mapped address (%llx)\n", - __func__, min_agaw, max_addr); + __func__, dmar_domain->gaw, max_addr); return -EFAULT; } dmar_domain->max_addr = max_addr;