linux-kernel - Re: [PATCH v2] net: macb: Specify PHY PM management done by MAC

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Date:   Thu, 20 Oct 2022 08:14:29 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <Sergiu.Moga@...rochip.com>, <Nicolas.Ferre@...rochip.com>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <linux@...linux.org.uk>,
        <f.fainelli@...il.com>, <Tudor.Ambarus@...rochip.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] net: macb: Specify PHY PM management done by MAC

On 19.10.2022 15:09, Sergiu Moga wrote:
> The `macb_resume`/`macb_suspend` methods already call the
> `phylink_start`/`phylink_stop` methods during their execution so
> explicitly say that the PM of the PHY is done by MAC by using the
> `mac_managed_pm` flag of the `struct phylink_config`.
> 
> This also fixes the warning message issued during resume:
> WARNING: CPU: 0 PID: 237 at drivers/net/phy/phy_device.c:323 mdio_bus_phy_resume+0x144/0x148
> 
> Depends-on: 96de900ae78e ("net: phylink: add mac_managed_pm in phylink_config structure")
> Fixes: 744d23c71af3 ("net: phy: Warn about incorrect mdio_bus_phy_resume() state")
> Signed-off-by: Sergiu Moga <sergiu.moga@...rochip.com>

Reviewed-by: Claudiu Beznea <claudiu.beznea@...rochip.com>


> ---
> 
> 
> v1 -> v2:
> - Add Depends-on: tag
> 
> 
>  drivers/net/ethernet/cadence/macb_main.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index 51c9fd6f68a4..4f63f1ba3161 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -806,6 +806,7 @@ static int macb_mii_probe(struct net_device *dev)
>  
>  	bp->phylink_config.dev = &dev->dev;
>  	bp->phylink_config.type = PHYLINK_NETDEV;
> +	bp->phylink_config.mac_managed_pm = true;
>  
>  	if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) {
>  		bp->phylink_config.poll_fixed_state = true;