linux-kernel - Re: [PATCH net-next 2/3] net: phy: broadcom: Add support for Wake-on-LAN

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Message-ID: <5711f834-8fc1-4144-bc12-e12388c2808a@lunn.ch>
Date:   Mon, 8 May 2023 21:09:45 +0200
From:   Andrew Lunn <andrew@...n.ch>
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>,
        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 2/3] net: phy: broadcom: Add support for
 Wake-on-LAN

> Because the Wake-on-LAN configuration can be set long before the system
> is actually put to sleep, we cannot have an interrupt service routine to
> clear on read the interrupt status register and ensure that new packet
> matches will be detected.

Hi Florian

I assume the interrupt is active low, not an edge. And it will remain
active until it is cleared? So on resume, don't you need to clear it?
Otherwise it is already active when entering the next suspend/resume
cycle.

	Andrew