diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 1840a05..954103d 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -3072,6 +3072,16 @@ static void __init init_no_remapping_devices(void)
 }
 
 #ifdef CONFIG_SUSPEND
+
+static void dump_iommu_data(struct intel_iommu *iommu)
+{
+	int i;
+	for (i=0; i < 0xc0; i++)
+		printk("%02x: %08x %08x %08x %08x\n", i,
+		       readl(iommu->reg + i), readl(iommu->reg + i + 4),
+		       readl(iommu->reg + i + 8),
+		       readl(iommu->reg + i + 12));
+}
 static int init_iommu_hw(void)
 {
 	struct dmar_drhd_unit *drhd;
@@ -3082,16 +3092,27 @@ static int init_iommu_hw(void)
 			dmar_reenable_qi(iommu);
 
 	for_each_active_iommu(iommu, drhd) {
+
+		printk("Resume IOMMU at %llx...\n",drhd->reg_base_addr);
+		dump_iommu_data(iommu);
+
+		printk("Flush write buffer...\n");
 		iommu_flush_write_buffer(iommu);
 
+		printk("Set root entry...\n");
 		iommu_set_root_entry(iommu);
 
+		printk("Flush global context...\n");
 		iommu->flush.flush_context(iommu, 0, 0, 0,
 					   DMA_CCMD_GLOBAL_INVL);
+		printk("Flush global iotlb...\n");
 		iommu->flush.flush_iotlb(iommu, 0, 0, 0,
 					 DMA_TLB_GLOBAL_FLUSH);
+		printk("Enable translation...\n");
 		iommu_enable_translation(iommu);
+		printk("Disable PMRs...\n");
 		iommu_disable_protect_mem_regions(iommu);
+		printk("Done!\n");
 	}
 
 	return 0;
@@ -3126,7 +3147,9 @@ static int iommu_suspend(struct sys_device *dev, pm_message_t state)
 	iommu_flush_all();
 
 	for_each_active_iommu(iommu, drhd) {
+		printk("Suspend IOMMU at %llx\n", drhd->reg_base_addr);
 		iommu_disable_translation(iommu);
+		dump_iommu_data(iommu);
 
 		spin_lock_irqsave(&iommu->register_lock, flag);