linux-kernel - Re: [PATCH RFC V2 3/4] net: introduce media selection IF_PORT

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Message-ID: <9b5ff966-3cee-3c1c-128f-79a086181566@i2se.com>
Date:   Wed, 8 Dec 2021 17:55:13 +0100
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Michael Heimpold <michael.heimpold@...tech.com>,
        jimmy.shen@...texcom.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH RFC V2 3/4] net: introduce media selection
 IF_PORT_HOMEPLUG

Am 06.12.21 um 20:29 schrieb Jakub Kicinski:
> On Sat,  4 Dec 2021 14:17:50 +0100 Stefan Wahren wrote:
>> Introduce a new media selection dedicated for HomePlug powerline
>> communication. This allows us to use the proper if_port setting in
>> HomePlug drivers.
>>
>> Suggested-by: Andrew Lunn <andrew@...n.ch>
>> Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
> I _think_ the IF_PORT API is an very ancient (Linux 2.2) way of
> switching ports on early Ethernet cards. Isn't it? It predates
> ethtool and all the modern interfaces. Quick grep seems to indicate
> it's accessed only for old HW as well.
>
> Do you have a use case for setting it?
Actually not, i will drop it from the patchset.