linux-kernel - Re: [PATCH] net: phy: Only resume phy if it is suspended

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <55a08719-cd18-4a01-9a2a-0115065c06a6@broadcom.com>
Date:   Tue, 5 Dec 2023 16:10:38 -0800
From:   Justin Chen <justin.chen@...adcom.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        florian.fainelli@...adcom.com,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: phy: Only resume phy if it is suspended



On 12/5/23 4:03 PM, Andrew Lunn wrote:
> On Tue, Dec 05, 2023 at 03:42:29PM -0800, Justin Chen wrote:
>> Resuming the phy can take quite a bit of time. Lets only resume the
>> phy if it is suspended.
> 
> Humm...
> 
> https://lore.kernel.org/netdev/6d45f4da-c45e-4d35-869f-85dd4ec37b31@lunn.ch/T/
> 
> If Broadcom PHYs are slow to resume, maybe you should solve this in
> the broadcom resume handler, read the status from the hardware and
> only do the resume if the hardware is suspended.
> 
>       Andrew

Right... Guess this won't work. It is odd that during resume we call 
__phy_resume twice. Once from phy_resume() and another at phy_start(). 
Let me rethink this. Thanks for the feedback.

Justin

Download attachment "smime.p7s" of type "application/pkcs7-signature" (4206 bytes)