iommu: Fix off by one in dmar_get_fault_reason()

[pandora-kernel.git] / drivers / iommu / dmar.c

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 35c1e17..97b2e21 100644 (file)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1056,8 +1056,8 @@ static const char *intr_remap_fault_reasons[] =
 
 const char *dmar_get_fault_reason(u8 fault_reason, int *fault_type)
 {
-       if (fault_reason >= 0x20 && (fault_reason <= 0x20 +
-                                    ARRAY_SIZE(intr_remap_fault_reasons))) {
+       if (fault_reason >= 0x20 && (fault_reason - 0x20 <
+                                       ARRAY_SIZE(intr_remap_fault_reasons))) {
                *fault_type = INTR_REMAP;
                return intr_remap_fault_reasons[fault_reason - 0x20];
        } else if (fault_reason < ARRAY_SIZE(dma_remap_fault_reasons)) {