netdev - RE: question on MAC passthrough and multiple devices in r8152

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Message-ID: <837bd96f9d574d3db0a4b71a9a8761a8@realtek.com>
Date:   Thu, 28 Jul 2022 07:59:47 +0000
From:   Hayes Wang <hayeswang@...ltek.com>
To:     Oliver Neukum <oneukum@...e.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: question on MAC passthrough and multiple devices in r8152

Oliver Neukum <oneukum@...e.com>
> Sent: Wednesday, July 27, 2022 6:52 PM
> To: Hayes Wang <hayeswang@...ltek.com>
> Cc: netdev@...r.kernel.org
> Subject: question on MAC passthrough and multiple devices in r8152
> 
> Hi,
> 
> I am looking at the logic the r8152 driver uses to
> assign a pass through MAC and I do not understand how
> you make sure that it is passed to one device only.
> As far as I can see the MAC comes from an ACPI object,
> hence the driver will happily read it out and assign
> it multiple times. Am I overlooking something?

You are right. And, the patches are not submitted by me.
As far as I know, our customers don't care the situation.
They would provide the guide to describe it. Besides, the
feature could be disabled through BIOS.

In addition, the Dell limits the specific devices to
use the feature of MAC passthrough. It could reduce such
situation.

Best Regards,
Hayes