linux-kernel - Re: [PATCH 1/1] ARM: dts: armada-xp-linksys-mamba: use wan instead of internet for DSA port

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Date:   Wed, 5 Apr 2017 16:28:24 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Ralph Sennhauser <ralph.sennhauser@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Jason Cooper <jason@...edaemon.net>,
        devicetree@...r.kernel.org, Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Rob Herring <robh+dt@...nel.org>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Subject: Re: [PATCH 1/1] ARM: dts: armada-xp-linksys-mamba: use wan instead
 of internet for DSA port

On Wed, Apr 05, 2017 at 07:28:46AM +0200, Ralph Sennhauser wrote:
> The LEDs for the "wan" port are already labeled "mamba:amber:wan" resp.
> "mamba:white:wan". So besides being an outlier with regard to the rest
> of the product line (see table below) changing the label fixes an
> internal inconsistency as well.
> 
> This will be visible in user space. Given commit cb4f71c42988 ("ARM:
> dts: armada-38x: change order of ethernet DT nodes on Armada 38x") it's
> expected to happen anyway. Commit 499400c9ac20 ("ARM: dts:
> armada-xp-linksys-mamba: Utilize new DSA binding") switches to the new
> bindings, use this opportunity to do it now rather than later.
> 
> |-----------------------------------------------------------------|
> | Labels used for the case and those used for the DSA ports       |
> |-----------------------------------------------------------------|
> | case labels	| armada-385-linksys-*	| armada-xp-linksys-mamba |
> |---------------|-----------------------|-------------------------|
> | internet	| wan			| internet		  |
> | 1		| lan1			| lan1			  |
> | 2		| lan2			| lan2			  |
> | 3		| lan3			| lan3			  |
> | 4		| lan4			| lan4			  |
> |-----------------------------------------------------------------|

Hi Ralph

I always encourage people to use the case labels as interface names.
So if i was going to make a change, it would be wan->internet for the 
armada-385-linksys-*.

> I underestimated the urge of people to make all the same before. While I do not
> particularly like this sort of change I see it coming anyway. So this patch is
> meant to make it a deliberate decision so it no longer is an item lurking in
> the shadows. Whether this patch gets taken or rejected my goal is reached.

I would say, this is now too late. Changing an interface name will
break configuration scripts. We are stuck with it.

      Andrew