diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 45c809f3d24f..03bf538eabda 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -86,7 +86,7 @@
 #define ACPI_DEVFLAG_LINT1              0x80
 #define ACPI_DEVFLAG_ATSDIS             0x10000000
 
-#define LOOP_TIMEOUT	100000
+#define LOOP_TIMEOUT	2000000
 /*
  * ACPI table definitions
  *