linux-kernel - Re: [PATCH 1/3 v3] net: usb: r8152: Check used MAC passthrough address

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Date:   Mon, 10 Jan 2022 12:39:25 +0100
From:   Oliver Neukum <oneukum@...e.com>
To:     Aaron Ma <aaron.ma@...onical.com>, kuba@...nel.org,
        henning.schild@...mens.com, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
CC:     davem@...emloft.net, hayeswang@...ltek.com, tiwai@...e.de
Subject: Re: [PATCH 1/3 v3] net: usb: r8152: Check used MAC passthrough
 address


On 05.01.22 16:14, Aaron Ma wrote:
> When plugin multiple r8152 ethernet dongles to Lenovo Docks
> or USB hub, MAC passthrough address from BIOS should be
> checked if it had been used to avoid using on other dongles.
>
> Currently builtin r8152 on Dock still can't be identified.
> First detected r8152 will use the MAC passthrough address.
>
> v2:
> Skip builtin PCI MAC address which is share MAC address with
> passthrough MAC.
> Check thunderbolt based ethernet.
I am sorry and I may be dense, why are you comparing
MACs? The pass-through is done per machine. All you
nee is a global flag, or if you want to be even more
formal, a reference count.

    Regards
        Oliver