netdev - RE: [PATCH v8 net-next 1/4] net: axienet: setup mdio unconditionally

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Date:   Tue, 5 Apr 2022 12:00:00 +0000
From:   Radhey Shyam Pandey <radheys@...inx.com>
To:     Andy Chiu <andy.chiu@...ive.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Michal Simek <michals@...inx.com>
CC:     "andrew@...n.ch" <andrew@...n.ch>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Greentime Hu <greentime.hu@...ive.com>,
        Robert Hancock <robert.hancock@...ian.com>
Subject: RE: [PATCH v8 net-next 1/4] net: axienet: setup mdio unconditionally

> -----Original Message-----
> From: Andy Chiu <andy.chiu@...ive.com>
> Sent: Tuesday, April 5, 2022 2:49 PM
> To: davem@...emloft.net; Michal Simek <michals@...inx.com>; Radhey
> Shyam Pandey <radheys@...inx.com>
> Cc: andrew@...n.ch; kuba@...nel.org; pabeni@...hat.com;
> robh+dt@...nel.org; krzk+dt@...nel.org; linux@...linux.org.uk;
> netdev@...r.kernel.org; devicetree@...r.kernel.org; Andy Chiu
> <andy.chiu@...ive.com>; Greentime Hu <greentime.hu@...ive.com>; Robert
> Hancock <robert.hancock@...ian.com>
> Subject: [PATCH v8 net-next 1/4] net: axienet: setup mdio unconditionally
> 
> The call to axienet_mdio_setup should not depend on whether "phy-node"
> pressents on the DT. Besides, since `lp->phy_node` is used if PHY is in SGMII or
:s/pressents/present

> 100Base-X modes, move it into the if statement. And the next patch will
> remove `lp->phy_node` from driver's private structure and do an of_node_put
> on it right away after use since it is not used elsewhere.
> 
> Signed-off-by: Andy Chiu <andy.chiu@...ive.com>
> Reviewed-by: Greentime Hu <greentime.hu@...ive.com>
> Reviewed-by: Robert Hancock <robert.hancock@...ian.com>

Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
> ---
>  drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> index c7eb05e4a6bf..78a991bbbcf9 100644
> --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
> @@ -2064,15 +2064,14 @@ static int axienet_probe(struct platform_device
> *pdev)
>  	if (ret)
>  		goto cleanup_clk;
> 
> -	lp->phy_node = of_parse_phandle(pdev->dev.of_node, "phy-handle",
> 0);
> -	if (lp->phy_node) {
> -		ret = axienet_mdio_setup(lp);
> -		if (ret)
> -			dev_warn(&pdev->dev,
> -				 "error registering MDIO bus: %d\n", ret);
> -	}
> +	ret = axienet_mdio_setup(lp);
> +	if (ret)
> +		dev_warn(&pdev->dev,
> +			 "error registering MDIO bus: %d\n", ret);
> +
>  	if (lp->phy_mode == PHY_INTERFACE_MODE_SGMII ||
>  	    lp->phy_mode == PHY_INTERFACE_MODE_1000BASEX) {
> +		lp->phy_node = of_parse_phandle(pdev->dev.of_node, "phy-
> handle", 0);
>  		if (!lp->phy_node) {
>  			dev_err(&pdev->dev, "phy-handle required for
> 1000BaseX/SGMII\n");
>  			ret = -EINVAL;
> --
> 2.34.1