linux-kernel - Re: [PATCH net-next v2 1/3] net: phy: Allow drivers to always call into ->suspend()

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Message-ID: <ZFy/A9vuxBl7WKt9@corigine.com>
Date:   Thu, 11 May 2023 12:10:11 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org, Doug Berger <opendmb@...il.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Marek Behún <kabel@...nel.org>,
        Peter Geis <pgwipeout@...il.com>,
        Frank <Frank.Sae@...or-comm.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v2 1/3] net: phy: Allow drivers to always call
 into ->suspend()

On Tue, May 09, 2023 at 03:34:01PM -0700, Florian Fainelli wrote:
> A few PHY drivers are currently attempting to not suspend the PHY when
> Wake-on-LAN is enabled, however that code is not currently executing at
> all due to an early check in phy_suspend().
> 
> This prevents PHY drivers from making an appropriate decisions and put
> the hardware into a low power state if desired.
> 
> In order to allow the PHY drivers to opt into getting their ->suspend
> routine to be called, add a PHY_ALWAYS_CALL_SUSPEND bit which can be
> set. A boolean that tracks whether the PHY or the attached MAC has
> Wake-on-LAN enabled is also provided for convenience.
> 
> If phydev::wol_enabled then the PHY shall not prevent its own
> Wake-on-LAN detection logic from working and shall not prevent the
> Ethernet MAC from receiving packets for matching.
> 
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>

Reviewed-by: Simon Horman <simon.horman@...igine.com>