netdev - Re: [PATCH net-next 02/10] r8169: use phy_resume/phy

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Message-ID: <8ef120d3-ac4a-7ffd-2104-76d6f1268105@gmail.com>
Date:   Mon, 2 Jul 2018 23:24:32 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     David Miller <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Realtek linux nic maintainers <nic_swsd@...ltek.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 02/10] r8169: use phy_resume/phy_suspend

On 02.07.2018 23:06, Andrew Lunn wrote:
>>  static void r8168_pll_power_down(struct rtl8169_private *tp)
>>  {
>>  	if (r8168_check_dash(tp))
>> @@ -4510,7 +4469,8 @@ static void r8168_pll_power_down(struct rtl8169_private *tp)
>>  	if (rtl_wol_pll_power_down(tp))
>>  		return;
>>  
>> -	r8168_phy_power_down(tp);
>> +	/* cover the case that PHY isn't connected */
>> +	phy_suspend(mdiobus_get_phy(tp->mii_bus, 0));
> 
> This could do some more explanation. Why would it not be connected?
> 
The PHY gets connected when the net_device is opened. If a network
port isn't used then it will be runtime-suspended a few seconds after
boot. In this case we call r8168_pll_power_down() with the PHY not
being connected. 

>      Andrew
>