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Date: Fri, 7 Jan 2022 17:55:25 +0100 From: Andrew Lunn <andrew@...n.ch> To: "Russell King (Oracle)" <linux@...linux.org.uk> Cc: Pali Rohár <pali@...nel.org>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Rob Herring <robh+dt@...nel.org>, Marek Behún <kabel@...nel.org>, netdev@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/2] of: net: Add helper function of_get_ethdev_label() On Fri, Jan 07, 2022 at 04:29:31PM +0000, Russell King (Oracle) wrote: > On Fri, Jan 07, 2022 at 05:12:21PM +0100, Pali Rohár wrote: > > Adds a new helper function of_get_ethdev_label() which sets initial name of > > specified netdev interface based on DT "label" property. It is same what is > > doing DSA function dsa_port_parse_of() for DSA ports. > > > > This helper function can be useful for drivers to make consistency between > > DSA and netdev interface names. > > > > Signed-off-by: Pali Rohár <pali@...nel.org> > > Doesn't this also need a patch to update the DT binding document > Documentation/devicetree/bindings/net/ethernet-controller.yaml ? > > Also it needs a covering message for the series, and a well thought > out argument why this is required. Consistency with DSA probably > isn't a good enough reason. > > >From what I remember, there have been a number of network interface > naming proposals over the years, and as you can see, none of them have > been successful... but who knows what will happen this time. I agree with Russell here. I doubt this is going to be accepted. DSA is special because DSA is very old, much older than DT, and maybe older than udev. The old DSA platform drivers had a mechanism to supply the interface name to the DSA core. When we added a DT binding to DSA we kept that mechanism, since that mechanism had been used for a long time. Even if you could show there was a generic old mechanism, from before the days of DT, that allowed interface names to be set from platform drivers, i doubt it would be accepted because there is no continuity, which DSA has. Andrew
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