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Date:   Wed, 15 Jan 2020 07:04:03 +0000
From:   Hayes Wang <hayeswang@...ltek.com>
To:     Kai Heng Feng <kai.heng.feng@...onical.com>,
        "Mario.Limonciello@...l.com" <Mario.Limonciello@...l.com>
CC:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        "pmalani@...omium.org" <pmalani@...omium.org>,
        "grundler@...omium.org" <grundler@...omium.org>,
        "<David.Chen7@...l.com>" <David.Chen7@...l.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] r8152: Add MAC passthrough support to new device

Kai Heng Feng [mailto:kai.heng.feng@...onical.com]
> Sent: Wednesday, January 15, 2020 2:40 PM
[...]
> >> Device 0xa387 also supports MAC passthrough, therefore add it to the
> >> whitelst.
> >
> > Have you confirmed whether this product ID is unique to the products that
> > support this feature or if it's also re-used in other products?
> 
> This is unique for Lenovo product.
> 
> >
> > For Dell's devices there are very specific tests that make sure that this
> > feature only applies on the products it is supposed to and nothing else
> > (For example RTL8153-AD checks variant as well as effuse value)
> > (Example two: RTL8153-BND is a Dell only part).
> 
> Hayes, do you know how macpassthru on Lenovo dock works?

I don't sure about it.

The Dell's devices use the VID/PID of Realtek, so they have another way
to check which devices support macpassthru.

The Lenovo use their VID/PID, so I guess they only check VID/PID.

Best Regards,
Hayes



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