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From: Andrew Lunn <andrew@lunn.ch>
To: "Russell King (Oracle)" <linux@armlinux.org.uk>
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>,
	Vladimir Oltean <olteanv@gmail.com>,
	"peppe.cavallaro@st.com" <peppe.cavallaro@st.com>,
	"alexandre.torgue@foss.st.com" <alexandre.torgue@foss.st.com>,
	"joabreu@synopsys.com" <joabreu@synopsys.com>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"kuba@kernel.org" <kuba@kernel.org>,
	"mcoquelin.stm32@gmail.com" <mcoquelin.stm32@gmail.com>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"f.fainelli@gmail.com" <f.fainelli@gmail.com>,
	"hkallweit1@gmail.com" <hkallweit1@gmail.com>,
	dl-linux-imx <linux-imx@nxp.com>
Subject: Re: [PATCH] net: stmmac: fix MAC not working when system resume back with WoL enabled
Date: Mon, 6 Sep 2021 15:23:49 +0200	[thread overview]
Message-ID: <YTYWZaVJoETikxeF@lunn.ch> (raw)
In-Reply-To: <YTX515RMVNmT4q+o@shell.armlinux.org.uk>

> We do have the ability to place the link into the slowest mutually
> supported speed via phy(link)?_speed_down(). This has the advantage of
> reducing the power used to keep the link active while in suspend (which
> is its primary purpose) but also reduces the possible link modes that
> could be autonegotiated with the partner.
> 
> I think I'd suggest to Andrew that phy_speed_down() should only
> advertise one capability, not "everything we support below the minimum
> mutually supported capability" - that way, if a link change is attempted
> on the partner while the system is suspended, the link will not come up
> and its obvious it isn't going to work.

Yes, that sounds reasonable.

> I think this is an issue for a separate patch set.

Yes, i would say a change like that is net-next material.

     Andrew

  reply	other threads:[~2021-09-06 13:24 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-01  9:02 Joakim Zhang
2021-09-01  9:13 ` Russell King (Oracle)
2021-09-01 10:21   ` Joakim Zhang
2021-09-01 12:56     ` Russell King (Oracle)
2021-09-02  7:01       ` Joakim Zhang
2021-09-01 15:40     ` Heiner Kallweit
2021-09-02  7:35       ` Joakim Zhang
2021-09-01  9:21 ` Vladimir Oltean
2021-09-01 10:25   ` Joakim Zhang
2021-09-01 10:56     ` Vladimir Oltean
2021-09-01 11:42       ` Joakim Zhang
2021-09-01 13:25         ` Russell King (Oracle)
2021-09-02  7:28           ` Joakim Zhang
2021-09-02  8:32             ` Russell King (Oracle)
2021-09-02 10:26               ` Joakim Zhang
2021-09-02 10:49                 ` Russell King (Oracle)
2021-09-02 11:15                   ` Joakim Zhang
2021-09-02 12:24                     ` Andrew Lunn
2021-09-03  6:51                       ` Joakim Zhang
2021-09-03  8:01                         ` Russell King (Oracle)
2021-09-03  8:39                           ` Joakim Zhang
2021-09-03  9:32                             ` Russell King (Oracle)
2021-09-03 11:04                               ` Joakim Zhang
2021-09-03 12:01                                 ` Russell King (Oracle)
2021-09-03 20:12                                   ` Russell King - ARM Linux admin
2021-09-06  2:29                                     ` Joakim Zhang
2021-09-06  9:34                                       ` Russell King (Oracle)
2021-09-06 10:41                                         ` Joakim Zhang
2021-09-06 11:21                                           ` Russell King (Oracle)
2021-09-06 13:23                                             ` Andrew Lunn [this message]
2021-09-07  8:52                                             ` Russell King (Oracle)
2021-09-06  2:21                                   ` Joakim Zhang

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