Re: [PATCH] net: ravb: Fix PHY state warning splat during system resume

[Sergey Shtylyov]

On 9/19/22 5:48 PM, Geert Uytterhoeven wrote:

> Since commit 744d23c71af39c7d ("net: phy: Warn about incorrect
> mdio_bus_phy_resume() state"), a warning splat is printed during system
> resume with Wake-on-LAN disabled:
> 
>         WARNING: CPU: 0 PID: 1197 at drivers/net/phy/phy_device.c:323 mdio_bus_phy_resume+0xbc/0xc8
> 
> As the Renesas Ethernet AVB driver already calls phy_{stop,start}() in
> its suspend/resume callbacks, it is sufficient to just mark the MAC
> responsible for managing the power state of the PHY.
> 
> Fixes: fba863b816049b03 ("net: phy: make PHY PM ops a no-op if MAC driver manages PHY PM")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

Reviewed-by: Sergey Shtylyov <s.shtylyov@xxxxxx>

[...]

> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index d013cc1c8a0ad007..abe6f570fe102636 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -1449,6 +1449,8 @@ static int ravb_phy_init(struct net_device *ndev)
>  		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
>  	}
>  
> +	/* Indicate that the MAC is responsible for managing PHY PM */
> +	phydev->mac_managed_pm = true;

   Hm, this field is declared as *unsigned*...

>  	phy_attached_info(phydev);
[...]

MBR, Sergey