[PATCH v3 3/6] PCI: mediatek: Use helper function for_each_available_child_of_node_scoped()

[Zhang Zekun <zhangzekun11@huawei.com>]

for_each_available_child_of_node_scoped() provides a scope-based cleanup
functionality to put the device_node automatically, and we don't need to
call of_node_put() directly.  Let's simplify the code a bit with the use
of these functions.

Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
v2:
- Use dev_err_probe() to simplify code.
- Fix spelling error in commit message.

 drivers/pci/controller/pcie-mediatek.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 9be3cebd862e..0457b9d0ad8b 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -1042,24 +1042,22 @@ static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
 static int mtk_pcie_setup(struct mtk_pcie *pcie)
 {
 	struct device *dev = pcie->dev;
-	struct device_node *node = dev->of_node, *child;
+	struct device_node *node = dev->of_node;
 	struct mtk_pcie_port *port, *tmp;
 	int err, slot;
 
 	slot = of_get_pci_domain_nr(dev->of_node);
 	if (slot < 0) {
-		for_each_available_child_of_node(node, child) {
+		for_each_available_child_of_node_scoped(node, child) {
 			err = of_pci_get_devfn(child);
-			if (err < 0) {
-				dev_err(dev, "failed to get devfn: %d\n", err);
-				goto error_put_node;
-			}
+			if (err < 0)
+				return dev_err_probe(dev, err, "failed to get devfn\n");
 
 			slot = PCI_SLOT(err);
 
 			err = mtk_pcie_parse_port(pcie, child, slot);
 			if (err)
-				goto error_put_node;
+				return err;
 		}
 	} else {
 		err = mtk_pcie_parse_port(pcie, node, slot);
@@ -1080,9 +1078,6 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
 		mtk_pcie_subsys_powerdown(pcie);
 
 	return 0;
-error_put_node:
-	of_node_put(child);
-	return err;
 }
 
 static int mtk_pcie_probe(struct platform_device *pdev)
-- 
2.17.1