Re: [PATCH iwl-next 4/9] igc: Add support for receiving frames with all zeroes address

[Vladimir Oltean]

On Mon, Dec 16, 2024 at 01:47:15AM -0500, Faizal Rahim wrote:
> From: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx>
> 
> The frame preemption verification (as defined by IEEE 802.3-2018
> Section 99.4.3) handshake is done by the driver, the default
> configuration of the driver is to only receive frames with the driver
> address.
> 
> So, in preparation for that add a second address to the list of
> acceptable addresses.
> 
> Because the frame preemption "verify_enable" toggle only affects the
> transmission of verification frames, this needs to always be enabled.
> As that address is invalid, the impact in practical scenarios should
> be minimal. But still a bummer that we have to do this.

Stuff that happened since this patch was written: "ethtool --set-mm
pmac-enabled on" exists. You don't have to accept verification frames if
the pMAC is disabled. You can enable the reception of 00:00:00:00:00:00
using that, and keep it off by default.