From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C22C5D41144 for ; Thu, 15 Jan 2026 08:49:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=edU6xkXjAjWZJykGFUAvi4D1HZcCJChoYmvCxl8CEyU=; b=MEnRfmjG1pngDlcpKEWOQivLGX /dE88d7DMzygghSAEakPYUjB83NWtzugQCeD0BY/YbUOXaSWyDPLDsBy/zhMG0jfC4JQxnG5ggPyN XmGkkQY0azM8DdPAP3Wykw7q1j7Xa25lCKkTbADdw33Q4l9PuEmv9NMA8xto1zs/Nf6WJrEKyL6Ik Zdbu38C0wVbd1H7SeNZ6kx/Gx8Oe6ADiQ0N2TEl0QE+iGRxB3a8sdDBMKznHbFHDisUs5d1WKiSX7 qRkgGLgHgPcBcUivoTtQyeCwmyahk7LsuURKT3hzb3+OP2m20ZQV/pKED6YV3qzx84leKKPBxImje 4QCGcfpQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vgJ2a-0000000C1Ec-1LRM; Thu, 15 Jan 2026 08:49:16 +0000 Received: from mail-pl1-x631.google.com ([2607:f8b0:4864:20::631]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vgJ2X-0000000C1Dr-2hLu for linux-arm-kernel@lists.infradead.org; Thu, 15 Jan 2026 08:49:14 +0000 Received: by mail-pl1-x631.google.com with SMTP id d9443c01a7336-2a081c163b0so3643735ad.0 for ; Thu, 15 Jan 2026 00:49:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1768466952; x=1769071752; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=edU6xkXjAjWZJykGFUAvi4D1HZcCJChoYmvCxl8CEyU=; b=IJecGVPNhmSiWL1TqfCVtVRRdwiq4WCFhThGiTU5DE9jslWwucJvqblX2PkLiruHp3 Mvf55+itSbasmTkDx7ec1hG43pP7AAnpnHrZ4u4YzQCyMAKjHikq9w6cs0e/+9e86XfT XKDPwd8n/lSxFA/o6GlUi7k/J+TB4p8ScOos72vyMB1By2htN2AXGWBtwX2/c1Yc9dR8 sYVVoJA1a5XzyB+QkCziqjcf9CE9+9v7aI+2fPSYVTaPQLEb2FMFru5ciDbYJ1ZL2vbg SetCBfYlDe1LPz95cZzrPS/p7rIlp/vMhTqzFODXI0SvGals/Oh06VDxSvff6S/lHrVs 7FAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768466952; x=1769071752; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=edU6xkXjAjWZJykGFUAvi4D1HZcCJChoYmvCxl8CEyU=; b=YfeVYY36GZWuoHu3abWPSHduncH6IqnvzZuB9ZEwXojl7pzv4sfGdbpUNTyAttWtHi diN62tULnMUBOL68V1E5sOCuTddxMq6/w5q3tec3gxP/MdLrPL7o5TAO5hV58ilrAeqx yfFtiReZblsVe+AXRAX01+TtCUWMCHqh3GFGsyZ6VumAEpE3zX+T/7vi43g16PZyEBOC nLbDDALMnHfiuTGDhia6blqHxSoXY5G1p3lPT2wd49xXj9wTVp5pO6FAVkR7KNkmmfmi 9If6vBz/XjC2de3eTsVh2nVBSSJkS/uiTbMCu4GUzaBMpaWda8V6xJrHswplsXhkss+d Ihlg== X-Gm-Message-State: AOJu0YzEdSlnYqDmf8a4H8hMImUjtYM5NeHW6MhhjB2IPmzJzsHCinng 4NFJvJ7CKsbpNbVy9gEx5yPNsiUisJL4d2OJKLAaGEnfD4oEI5qX6WrK X-Gm-Gg: AY/fxX47gB0rgqEHuXA7//LDWu76YrdJ2etNBV0WO3VZwiTPuKwmc0keb5BKpXya4PY DwPxLk4RloZNrxnGh5r1XD1tfb2W5btnJgZMRR+LTWxQvHTvf+UymFAyJRn8HpwB7ITGToH4aW1 EXaY6apv0iyM0xpYiCYDyKU2sorjz8hVcxSED+RiK+Y6fIwK4jCtHwFIrixrLRJcJgcIu69940P mY09PzW5wFpy0w4qdfsrhylX2V1qnNRyFYFRVmTLuivAZpUhCZD83fuS6OJ9HgCzVQkZeq72+wt CfGalIbTydJLVhFwcDy04psnWh2V7Ag4WlFJHu6O0RVb89wXSdAKYHYcIaBDGFWxfU8elWMLpn4 IOjrTGASuBr1OImkqzbUgnCLIt1l+WnRSfsm1QzeHLXxLXfl87N31AqHzURxZeKObp1mSDQNuOT 3L+9N7CNAlmoWEtOSkM/f0D/I= X-Received: by 2002:a17:902:e551:b0:2a3:1b33:ae30 with SMTP id d9443c01a7336-2a599e3df46mr45989525ad.51.1768466952287; Thu, 15 Jan 2026 00:49:12 -0800 (PST) Received: from nbai25050028.lan ([2409:4090:807d:4601:625b:d547:cf6b:e854]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a3e3cd2b3asm243846775ad.88.2026.01.15.00.49.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Jan 2026 00:49:11 -0800 (PST) From: Sayantan Nandy To: lorenzo@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, sayantan.nandy@airoha.com, bread.hsu@airoha.com, kuldeep.malik@airoha.com, aniket.negi@airoha.com, rajeev.kumar@airoha.com, Sayantan Nandy Subject: [PATCH] net: airoha_eth: increase max mtu to 9220 for DSA jumbo frames Date: Thu, 15 Jan 2026 14:18:37 +0530 Message-ID: <20260115084837.52307-1-sayantann11@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260115_004913_680524_58B406F7 X-CRM114-Status: GOOD ( 11.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Industry standard for jumbo frame MTU is 9216 bytes. When using DSA sub-system, an extra 4 byte tag is added to each frame. To allow users to set the standard 9216-byte MTU via ifconfig,increase AIROHA_MAX_MTU to 9220 bytes (9216+4). Signed-off-by: Sayantan Nandy --- drivers/net/ethernet/airoha/airoha_eth.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h index fbbc58133364..20e602d61e61 100644 --- a/drivers/net/ethernet/airoha/airoha_eth.h +++ b/drivers/net/ethernet/airoha/airoha_eth.h @@ -21,7 +21,7 @@ #define AIROHA_MAX_NUM_IRQ_BANKS 4 #define AIROHA_MAX_DSA_PORTS 7 #define AIROHA_MAX_NUM_RSTS 3 -#define AIROHA_MAX_MTU 9216 +#define AIROHA_MAX_MTU 9220 #define AIROHA_MAX_PACKET_SIZE 2048 #define AIROHA_NUM_QOS_CHANNELS 4 #define AIROHA_NUM_QOS_QUEUES 8 -- 2.43.0