1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 5ef65cf66152..3a74e4410fc0 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1057,8 +1057,8 @@ static const char *irq_remap_fault_reasons[] =
 
 const char *dmar_get_fault_reason(u8 fault_reason, int *fault_type)
 {
-        if (fault_reason >= 0x20 && (fault_reason <= 0x20 +
-                                     ARRAY_SIZE(irq_remap_fault_reasons))) {
+        if (fault_reason >= 0x20 && (fault_reason - 0x20 <
+                                        ARRAY_SIZE(irq_remap_fault_reasons))) {
                 *fault_type = INTR_REMAP;
                 return irq_remap_fault_reasons[fault_reason - 0x20];
         } else if (fault_reason < ARRAY_SIZE(dma_remap_fault_reasons)) {