diff --git a/[refs] b/[refs]
index 17622d0cb856..7a370fc3a48c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f5e9705c6429d24dee832b2edd7f4848d432ea03
+refs/heads/master: 47bccd6bb2b866449d3ecf2ba350ac1c7473b2b8
diff --git a/trunk/arch/x86/kernel/amd_iommu.c b/trunk/arch/x86/kernel/amd_iommu.c
index 33434c497a6a..04ff5ec4ac0e 100644
--- a/trunk/arch/x86/kernel/amd_iommu.c
+++ b/trunk/arch/x86/kernel/amd_iommu.c
@@ -824,6 +824,11 @@ static void dma_ops_free_addresses(struct dma_ops_domain *dom,
 
 	BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL);
 
+#ifdef CONFIG_IOMMU_STRESS
+	if (i < 4)
+		return;
+#endif
+
 	if (address >= dom->next_address)
 		dom->need_flush = true;