netdev - Re: [PATCH] net: mvneta: only do WoL speed down if the PHY is valid

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Message-ID: <20200521151916.GC677363@lunn.ch>
Date:   Thu, 21 May 2020 17:19:16 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Daniel González Cabanelas <dgcbueu@...il.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net,
        thomas.petazzoni@...tlin.com,
        Russell King <rmk+kernel@...linux.org.uk>
Subject: Re: [PATCH] net: mvneta: only do WoL speed down if the PHY is valid

>  drivers/net/ethernet/marvell/mvneta.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
> index 41d2a0eac..f9170bc93 100644
> --- a/drivers/net/ethernet/marvell/mvneta.c
> +++ b/drivers/net/ethernet/marvell/mvneta.c
> @@ -3567,8 +3567,9 @@ static void mvneta_start_dev(struct mvneta_port *pp)
>  
>  	phylink_start(pp->phylink);
>  
> -	/* We may have called phy_speed_down before */
> -	phy_speed_up(pp->dev->phydev);
> +	if(pp->dev->phydev)
> +		/* We may have called phy_speed_down before */
> +		phy_speed_up(pp->dev->phydev);

I don't think it is as simple as this. You should not really be mixing
phy_ and phylink_ calls within one driver. You might of noticed there
are no other phy_ calls in this driver. So ideally you want to add
phylink_ calls which do the right thing.

	 Andrew