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-rw-r--r--drivers/pci/dmar.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 380b60e677e..3264b626725 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -1226,7 +1226,7 @@ irqreturn_t dmar_fault(int irq, void *dev_id)
source_id, guest_addr);
fault_index++;
- if (fault_index > cap_num_fault_regs(iommu->cap))
+ if (fault_index >= cap_num_fault_regs(iommu->cap))
fault_index = 0;
spin_lock_irqsave(&iommu->register_lock, flag);
}