diff --git a/drivers/iommu/rk-iommu.c b/drivers/iommu/rk-iommu.c
index b3bb9f38b313..0520d2c63405 100644
--- a/drivers/iommu/rk-iommu.c
+++ b/drivers/iommu/rk-iommu.c
@@ -766,7 +766,7 @@ int rockchip_iommu_tlb_invalidate_global(struct device *dev)
 {
 	unsigned long flags;
 	struct iommu_drvdata *data = dev_get_drvdata(dev->archdata.iommu);
-	int ret;
+	int ret = 0;
 
 	spin_lock_irqsave(&data->data_lock, flags);