diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 1c0255e4ff29e36950d5b86e0f45cf4d9b13d2f0..6d347064b8b0f1a097958907cb402596acdbe0b9 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -964,7 +964,7 @@ static void intel_compose_msi_msg(struct pci_dev *pdev,
 {
 	struct irq_cfg *cfg;
 	struct irte irte;
-	u16 sub_handle;
+	u16 sub_handle = 0;
 	int ir_index;
 
 	cfg = irq_get_chip_data(irq);