linux-kernel - Re: [PATCH v2] net: ethernet: support "fixed-link" DT key/node on nb8800 driver

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Date:	Fri, 05 Feb 2016 13:58:30 +0000
From:	Måns Rullgård <mans@...sr.com>
To:	Sebastian Frias <sf84@...oste.net>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>, mason <slash.tmp@...e.fr>
Subject: Re: [PATCH v2] net: ethernet: support "fixed-link" DT key/node on nb8800 driver

Sebastian Frias <sf84@...oste.net> writes:

> Signed-off-by: Sebastian Frias <sf84@...oste.net>
> ---
>  drivers/net/ethernet/aurora/nb8800.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ethernet/aurora/nb8800.c
> b/drivers/net/ethernet/aurora/nb8800.c
> index ecc4a33..dd7bedc 100644
> --- a/drivers/net/ethernet/aurora/nb8800.c
> +++ b/drivers/net/ethernet/aurora/nb8800.c
> @@ -1462,9 +1462,18 @@ static int nb8800_probe(struct platform_device *pdev)
>
>  	priv->phy_node = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
>  	if (!priv->phy_node) {
> -		dev_err(&pdev->dev, "no PHY specified\n");
> -		ret = -ENODEV;
> -		goto err_free_bus;
> +		if (of_phy_is_fixed_link(pdev->dev.of_node)) {
> +			ret = of_phy_register_fixed_link(pdev->dev.of_node);
> +			if (ret < 0) {
> +				dev_err(&pdev->dev, "bad fixed-link spec\n");
> +				goto err_free_bus;
> +			}
> +			priv->phy_node = of_node_get(pdev->dev.of_node);
> +		} else {
> +			dev_err(&pdev->dev, "no PHY specified\n");
> +			ret = -ENODEV;
> +			goto err_free_bus;
> +		}
>  	}

Maybe it would be clearer to reduce the if() nesting a bit, like this
for instance:

	if (of_phy_is_fixed_link(pdev->dev.of_node)) {
		ret = of_phy_register_fixed_link(pdev->dev.of_node);
		if (ret < 0) {
			dev_err(&pdev->dev, "bad fixed-link spec\n");
			goto err_free_bus;
		}
		priv->phy_node = of_node_get(pdev->dev.of_node);
	}

	if (!priv->phy_node)
		priv->phy_node = of_parse_phandle(pdev->dev.of_node,
						  "phy-handle", 0);

	if (!priv->phy_node) {
		dev_err(&pdev->dev, "no PHY specified\n");
		ret = -ENODEV;
		goto err_free_bus;
	}


-- 
Måns Rullgård