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 B4EBD35DD1C; Mon, 1 Jun 2026 13:50:03 +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=1780321804; cv=none; b=P+bd6FyN/cLrJk451/3B8v69puLvFi2N5ibs7j250X4H82BPsU1ZuVwD+8eVSdRVWxXGLyH4LKF+Iwhjdw/lBDhvfNZ8nHvPWQNxajQKLtEg9woG89Hm/qoZB7B7driXgQVKKM9oo9nDZM4i0Ke9BejxkNJSdZq6x9gNb20maf0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780321804; c=relaxed/simple; bh=aibuByHf8qRDGR3RWczGu9wUpXkwv/XzH0qX2scuoko=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=Ae00UHr9WqIieCgZpX/UDvBXh6tBnEAgjHCL6w3e8bjuGIeWectDSDZ/Srp3BbJqXlt5dqeJtLWzI9jiyAuG4ccICJ44ITWpwOVkRYwcbqs8NRD046NIrWnl5Xzgl9Xce6qFfYRtNfh6ywM40ytLuGVjhsiYZgTOaPFtv8DHA/A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AYONUreP; 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="AYONUreP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58AD71F00893; Mon, 1 Jun 2026 13:50:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780321803; bh=u7M/UMMShomoyiLwJ8rDZDuYNqd/j3nRdYj5RlobyyI=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=AYONUrePbn6h8O+jl3n14FOuErv+DdtnQYmgCsFN5yy2hGN7UUUTTVCtWpRCgKQ/b k608Td6bcHY9wJ2KxN22oMLSEIdOA0PHrSU2tTfiC/GviuVJE8YoFwJfPWrfjVkkZQ TYuiTQcTzD9gX4gnJp49eJtCmac33VMinyAYDzftwDb6IxCK9onsjYRc0HbyB9S8Qi KxboalZwVP6UQGWtIK0VnWSaVH6DqT7yvme9IgfPFGkv3n2XeA0hj8e41f+2xl3uV9 wf0KjmHhjSj6zwYuhq97e4eqBUq2yxIXQCeJfuZfZyScMTrUOZuRLWWaHkrRMJ5bn1 AX5tmaZrxke0g== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 133D238119D5; Mon, 1 Jun 2026 13:50:07 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net-next] net: ibm: emac: Reserve VLAN header in MJS limit From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178032180590.3687626.10937538146710497492.git-patchwork-notify@kernel.org> Date: Mon, 01 Jun 2026 13:50:05 +0000 References: <20260526202247.13823-1-rosenp@gmail.com> In-Reply-To: <20260526202247.13823-1-rosenp@gmail.com> To: Rosen Penev Cc: netdev@vger.kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net-next.git (main) by Paolo Abeni : On Tue, 26 May 2026 13:22:47 -0700 you wrote: > The IBM EMAC programs its Maximum Jumbo Size (MJS) drop > threshold from ndev->mtu directly. The hardware sizes the threshold > against the L2 frame minus the ethernet header, but does not > discount the 802.1Q tag, so a frame carrying a VLAN tag and a full > 1500-byte payload exceeds MJS by exactly 4 bytes and is dropped. > > This is normally hidden because JPSM (and therefore the MJS check) > only engages when the MTU is raised above ETH_DATA_LEN. With the > qca8k DSA tagger the conduit MTU is bumped by QCA_HDR_LEN to 1502 > during dsa_conduit_setup(), which is enough to enable JPSM and > expose the off-by-VLAN-tag in the limit. > > [...] Here is the summary with links: - [net-next] net: ibm: emac: Reserve VLAN header in MJS limit https://git.kernel.org/netdev/net-next/c/0906c117f81c You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html