diff --git a/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/esw_rt3050.c b/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/esw_rt3050.c
index 6cad5856cd..816c588dd7 100644
--- a/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/esw_rt3050.c
+++ b/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/esw_rt3050.c
@@ -1358,8 +1358,8 @@ static int esw_probe(struct platform_device *pdev)
 	esw->dev = &pdev->dev;
 	esw->irq = irq_of_parse_and_map(np, 0);
 	esw->base = devm_ioremap_resource(&pdev->dev, res);
-	if (!esw->base)
-		return -EADDRNOTAVAIL;
+	if (IS_ERR(esw->base))
+		return PTR_ERR(esw->base);
 
 	port_map = of_get_property(np, "mediatek,portmap", NULL);
 	if (port_map)
diff --git a/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c b/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c
index 4093f09d41..a4602c4586 100644
--- a/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c
+++ b/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c
@@ -215,8 +215,8 @@ static int mt7620_gsw_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	gsw->base = devm_ioremap_resource(&pdev->dev, res);
-	if (!gsw->base)
-		return -EADDRNOTAVAIL;
+	if (IS_ERR(gsw->base))
+		return PTR_ERR(gsw->base);
 
 	gsw->dev = &pdev->dev;
 
diff --git a/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7621.c b/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7621.c
index 9d5fe6efee..89be239007 100644
--- a/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7621.c
+++ b/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7621.c
@@ -245,8 +245,8 @@ static int mt7621_gsw_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	gsw->base = devm_ioremap_resource(&pdev->dev, res);
-	if (!gsw->base)
-		return -EADDRNOTAVAIL;
+	if (IS_ERR(gsw->base))
+		return PTR_ERR(gsw->base);
 
 	gsw->dev = &pdev->dev;
 	gsw->irq = platform_get_irq(pdev, 0);