[PATCH v2 4/6] PCI: mt7621: Use helper function for_each_available_child_of_node_scoped()

Zhang Zekun
2024-08-30T04:11:49Z

for_each_available_child_of_node_scoped() provides a scope-based cleanup
functinality 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: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
v2:
- Use dev_perr_probe to simplify code.
- Fix spelling error in commit message.

drivers/pci/controller/pcie-mt7621.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/pci/controller/pcie-mt7621.c b/drivers/pci/controller/pcie-mt7621.c
index 9b4754a45515..354d401428f0 100644
--- a/drivers/pci/controller/pcie-mt7621.c
+++ b/drivers/pci/controller/pcie-mt7621.c
@@ -258,30 +258,25 @@ static int mt7621_pcie_parse_dt(struct mt7621_pcie *pcie)
{
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
- struct device_node *node = dev->of_node, *child;
+ struct device_node *node = dev->of_node;
int err;

pcie->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pcie->base))
return PTR_ERR(pcie->base);

- for_each_available_child_of_node(node, child) {
+ for_each_available_child_of_node_scoped(node, child) {
int slot;

err = of_pci_get_devfn(child);
- if (err < 0) {
- of_node_put(child);
- dev_err(dev, "failed to parse devfn: %d\n", err);
- return err;
- }
+ if (err < 0)
+ return dev_err_probe(dev, err, "failed to parse devfn\n");

slot = PCI_SLOT(err);

err = mt7621_pcie_parse_port(pcie, child, slot);
- if (err) {
- of_node_put(child);
+ if (err)
return err;
- }
}

return 0;
--
2.17.1