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-rw-r--r--drivers/pci/dmar.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index f5a662a50acb..2b4162d9ca30 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -491,7 +491,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
int map_size;
u32 ver;
static int iommu_allocated = 0;
- int agaw;
+ int agaw = 0;
iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
if (!iommu)
@@ -507,6 +507,7 @@ 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);
+#ifdef CONFIG_DMAR
agaw = iommu_calculate_agaw(iommu);
if (agaw < 0) {
printk(KERN_ERR
@@ -514,6 +515,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
iommu->seq_id);
goto error;
}
+#endif
iommu->agaw = agaw;
/* the registers might be more than one page */