Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...

[deliverable/linux.git] / drivers / pci / dmar.c

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 5f164ff3026eb1cb4e91fd0acdb5bba2810ffbc6..f5a662a50acb12edea158dc114002cf1be33a418 100644 (file)
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -491,6 +491,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
        int map_size;
        u32 ver;
        static int iommu_allocated = 0;
+       int agaw;
 
        iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
        if (!iommu)
@@ -506,6 +507,15 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
        iommu->cap = dmar_readq(iommu->reg + DMAR_CAP_REG);
        iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG);
 
+       agaw = iommu_calculate_agaw(iommu);
+       if (agaw < 0) {
+               printk(KERN_ERR
+                       "Cannot get a valid agaw for iommu (seq_id = %d)\n",
+                       iommu->seq_id);
+               goto error;
+       }
+       iommu->agaw = agaw;
+
        /* the registers might be more than one page */
        map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap),
                cap_max_fault_reg_offset(iommu->cap));