1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 380b60e677e0..3264b626725a 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);
         }