fault_reason - 0x20 == ARRAY_SIZE(irq_remap_fault_reasons) is one past
the end of the array.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
v2: re-arranged slightly for readability
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 5ef65cf..3a74e44 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)) {
--
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