Re: [PATCH 2/5] PCI: mediatek: Use helper function for_each_available_child_of_node_scoped()

[Jonathan Cameron <Jonathan.Cameron@Huawei.com>]

On Wed, 28 Aug 2024 15:38:22 +0800
Zhang Zekun <zhangzekun11@huawei.com> wrote:

> 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>
A nice to have inline.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> ---
>  drivers/pci/controller/pcie-mediatek.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
> index 9be3cebd862e..d14e8d151c08 100644
> --- a/drivers/pci/controller/pcie-mediatek.c
> +++ b/drivers/pci/controller/pcie-mediatek.c
> @@ -1042,24 +1042,24 @@ 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;
> +				return err;

Could do			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 +1080,6 @@ 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)