From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 98FBB3254BD; Sat, 19 Sep 2026 00:48:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789778910; cv=none; b=ED1xYbYQelbbSHE3zCeAuC1eqaJF2GlVFpLlaRx7MUgTo/1FvoY44dmO3cZYh3uHJSffCU5H6SBASJ7Oz9M1Flme8MIPVHqU6qs9ffX4I5gYOit7DwfbphZCDkg7JLZ9PhOo4bRaSTj9UbvP6ZMalKXXh/KO2vF0QrBkDcZlNpE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789778910; c=relaxed/simple; bh=MCbmQ6WJDGdCzQN4mYg04ADyk1fF1OC+DJiGEgxhAdw=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=abeqpBpkOJJLyVA8cOPSPhQEFRGrtCTbFPDLD3stXiZgyLMZnHq8+FuvYo7s9sypLCVnDyLLZgmdeOMsM+c56rc47jjZ9CEod7FiXcL5Tl4PIHKrGzA6igfzRCVvQRfsHJAcJ2dzAxUy//XKggZ0KctfGwDZEn6EhfiPqPr8UME= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RUw5HGvE; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RUw5HGvE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7CB8D1F000FF; Sat, 19 Sep 2026 00:48:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789778898; bh=MCbmQ6WJDGdCzQN4mYg04ADyk1fF1OC+DJiGEgxhAdw=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=RUw5HGvE4NOuabChT6omhbwuPsmkFw8sBJTVrHIa3igoep+FaodwCNFN3Qzj+gYie DtsRevJzMoPULHVcNHKA8n7W29O1tlxdkmxxX0mCI7ExijWvKuBiUI3YrrAmhYxFAW CuBYZknAPhdL2q3gYT27jA+wMGqXK1YyavBKEWrJI0bfn6DNZ+GcF9Sg7wuGlugTwD S+IykXDZNXW8RKtdTumDSVr1meeQjJTWgIOCYSEuDCfB9duWGZtaWagVpNGLnW7ASn XhB2fYu2ItAwUo7gZJT0uPf2WMvBi9ZiH7/lOVq2C3tO2umtpz/GyK1Qjhq1cYMiyk OWqmT/Ai/7Hag== Date: Fri, 18 Sep 2026 17:48:16 -0700 From: Jakub Kicinski To: Linus Walleij Cc: netdev-bot+sashiko@kernel.org, woojung.huh@microchip.com, UNGLinuxDriver@microchip.com, andrew@lunn.ch, olteanv@gmail.com, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, marex@denx.de, horms@kernel.org, linux@armlinux.org.uk, nb@tipi-net.de, netdev@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH net-next v15 2/4] net: dsa: tag_ks8995: Add the KS8995 tag handling Message-ID: <20260918174816.0d77d5dd@kernel.org> In-Reply-To: References: <20260916-ks8995-to-ksz8-v15-2-8825ff5fd4be@kernel.org> <178965134740.22033.13313484925246996796@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Thu, 17 Sep 2026 23:18:42 +0200 Linus Walleij wrote: > On Thu, Sep 17, 2026 at 3:22=E2=80=AFPM w= rote: >=20 > > Two details worth noting: this only happens with a conduit MAC that str= ips > > the non-standard 0x810X TPID into metadata while preserving the port bi= ts, > > which was not demonstrated here, and the same OUT_BAD outcome already > > applies to other VLAN-metadata DSA taggers such as the tag_8021q family, > > where proto becomes ETH_P_XDSA and also has no case in the switch. Shou= ld > > the receive path here rely only on the in-band tag, or is degraded hash= ing > > on the conduit acceptable for this configuration? =20 >=20 > This is just getting too fringe. What about we merge this and look into t= his > when we have a user who actually want to do these things on this > old chip? >=20 > I don't think this is a blocker. Yes, sorry, I need to modify the emails to call it out more clearly. We only really care about issues >=3DMedium severity, but if there are any such issues found we send out the low ones too just in case.