netdev - Re: [PATCH net-next v1 4/4] usbnet: add support for label from device tree

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Message-ID: <YfJ6lhZMAEmetdad@kroah.com>
Date:   Thu, 27 Jan 2022 11:57:26 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Oliver Neukum <oneukum@...e.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH net-next v1 4/4] usbnet: add support for label from
 device tree

On Thu, Jan 27, 2022 at 11:49:05AM +0100, Oleksij Rempel wrote:
> Similar to the option to set a netdev name in device tree for switch
> ports by using the property "label" in the DSA framework, this patch
> adds this functionality to the usbnet infrastructure.
> 
> This will help to name the interfaces properly throughout supported
> devices. This provides stable interface names which are useful
> especially in embedded use cases.

Stable interface names are for userspace to set, not the kernel.

Why would USB care about this?  If you need something like this, get it
from the USB device itself, not DT, which should have nothing to do with
USB as USB is a dynamic, self-describing, bus.  Unlike DT.

So I do not think this is a good idea.

greg k-h