linux-kernel - Re: [PATCH net-next v2] net: phy: dp83867: Add speed optimization feature

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Date:   Wed, 19 Feb 2020 00:06:05 +0000
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Dan Murphy <dmurphy@...com>
Cc:     Grygorii Strashko <grygorii.strashko@...com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>, andrew@...n.ch,
        davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] net: phy: dp83867: Add speed optimization
 feature

On Tue, Feb 18, 2020 at 11:38:33AM -0600, Dan Murphy wrote:
> Russell
> 
> On 2/18/20 11:33 AM, Russell King - ARM Linux admin wrote:
> > As I mentioned, the PHY on either end of the link can be the one
> > which decides to downshift, and the partner PHY has no idea that
> > a downshift has happened.
> > 
> Exactly so we can only report that if the PHY on our end caused the
> downshift.  If this PHY does not cause the downshift then the message will
> not be presented even though a downshift occurred. So what is the value in
> presenting this message?

I think we are in agreement over questioning the value of reporting
the downshift!

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up