Re: [PATCH] net: sh_eth: 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: 626 at drivers/net/phy/phy_device.c:323 mdio_bus_phy_resume+0xbc/0xe4
> 
> As the Renesas SuperH Ethernet 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/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
> index 67ade78fb7671c4a..7fd8828d3a846169 100644
> --- a/drivers/net/ethernet/renesas/sh_eth.c
> +++ b/drivers/net/ethernet/renesas/sh_eth.c
> @@ -2029,6 +2029,8 @@ static int sh_eth_phy_init(struct net_device *ndev)
>  	if (mdp->cd->register_type != SH_ETH_REG_GIGABIT)
>  		phy_set_max_speed(phydev, SPEED_100);
>  
> +	/* Indicate that the MAC is responsible for managing PHY PM */

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

> +	phydev->mac_managed_pm = true;
>  	phy_attached_info(phydev);
[...]

MBR, Sergey