From nobody Fri Sep 25 13:55:16 2026 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.5]) (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 1B8B631B131; Fri, 11 Sep 2026 14:12:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789135979; cv=none; b=hONBfMabJPJHNdaUVWO4bZNTrr+GEufqVPde1NiJWtmH7ZRrgxeE/59EMh7s1fqylSrnQZCjSlDnvXTv5d+77d/ELjlA2i8R5YFZgLjI9pXfq8hCniLs6iAuVMnYmncZzknbBD+Qo2YxAftVcUnoOYz10TwG+4roCzttDvnBRUM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789135979; c=relaxed/simple; bh=T8WxXO9FTT15rv4bA9384oDKwaVYNYFd2lxKZ3hSvq0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mLvjxaG6tImvul/ACJH1FzNfrfcwKxLaTw4pjrxbFpOQcC2l9DIIp2iJVEZ+9PbgZBTk3Drfocyt1SB7VNXUeUNue5OGjflyy6seJ5XrBkiB7jhsnRvtLPTfQdTINL5CwLyZMPbb4Tu/ec1ExTbTqCzCm0xi3hKXs2QTycyJu/o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=VEZyFa43; arc=none smtp.client-ip=117.135.210.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="VEZyFa43" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=qE vj2N232ECgtoHTuAKDk68SEw+Xf7RHLDkBFRGAiTM=; b=VEZyFa43NvzEOVAeoV SFA2I1jwwejcsVZDx8C9CfhXV+rNzcNR3EYAUgUHskQl5edH/gO4j3IjcEH7qa4o U757JgN40ax4VGtVSKZAfPV5ly4dHphlheTceEWjV1sLASwgt+WO4Q79nBAcrAcf xkej0k02vS2iST8mb1TcMUgDg= Received: from hpl-VMware-Virtual-Platform.. (unknown []) by gzga-smtp-mtada-g0-4 (Coremail) with SMTP id _____wDnP38ODKRqLAZVAA--.27919S2; Fri, 11 Sep 2026 22:11:26 +0800 (CST) From: peilinhe2020@163.com To: he.peilin@zte.com.cn Cc: alexandre.torgue@foss.st.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, jiang.kun2@zte.com.cn, kuba@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, maxime.chevallier@bootlin.com, mcoquelin.stm32@gmail.com, netdev@vger.kernel.org, pabeni@redhat.com, vbridgers2013@gmail.com, xu.xin16@zte.com.cn Subject: [PATCH net v6] net: stmmac: remove software VLAN tag stripping Date: Fri, 11 Sep 2026 22:11:25 +0800 Message-ID: <20260911141126.10592-1-peilinhe2020@163.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <202609040845307827XHaxAT2PmgJc9jjPqfAP@zte.com.cn> References: <202609040845307827XHaxAT2PmgJc9jjPqfAP@zte.com.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wDnP38ODKRqLAZVAA--.27919S2 X-Coremail-Antispam: 1Uf129KBjvJXoWxWw13WF4DJr15Cw1rKFykXwb_yoW5try3pa 47Aa4DCr4kAr17Za1Utw48ZFyfAay5tayUJasYyw4ftanFkr9IqrnagFZxAFW0yrWfuw13 K34qva4UC3WDWrDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07UhyCXUUUUU= X-CM-SenderInfo: xshlzxhqkhjiisq6il2tof0z/xtbCzw7Je2qkDA7fkwAA3z Content-Type: text/plain; charset="utf-8" From: Peilin He The software VLAN stripping logic in stmmac_rx_vlan() was originally introduced in 2014 by commit b93819854d6e ("stmmac: Add vlan rx for better GRO performance.") as a workaround to improve GRO performance, since at that time GRO could not handle frames with VLAN tags. However, this limitation was resolved in 2015 by commit 66e5133f19e9 ("vlan: Add GRO support for non hardware accelerated vlan"), which added GRO support for non-hardware-accelerated VLAN frames. Keeping a software fallback path for VLAN stripping is no longer necessary and only adds complexity. Fixes: b93819854d6e ("stmmac: Add vlan rx for better GRO performance.") Signed-off-by: Peilin He Reviewed-by: xu xin Reviewed-by: Jiang Kun --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 28 ++----------------- 1 file changed, 2 insertions(+), 26 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/ne= t/ethernet/stmicro/stmmac/stmmac_main.c index 9c9e95d66b09..854b488611b4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -5032,24 +5032,6 @@ static netdev_features_t stmmac_features_check(struc= t sk_buff *skb, return vlan_features_check(skb, features); } =20 -static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb) -{ - struct vlan_ethhdr *veth =3D skb_vlan_eth_hdr(skb); - __be16 vlan_proto =3D veth->h_vlan_proto; - u16 vlanid; - - if ((vlan_proto =3D=3D htons(ETH_P_8021Q) && - dev->features & NETIF_F_HW_VLAN_CTAG_RX) || - (vlan_proto =3D=3D htons(ETH_P_8021AD) && - dev->features & NETIF_F_HW_VLAN_STAG_RX)) { - /* pop the vlan tag */ - vlanid =3D ntohs(veth->h_vlan_TCI); - memmove(skb->data + VLAN_HLEN, veth, ETH_ALEN * 2); - skb_pull(skb, VLAN_HLEN); - __vlan_hwaccel_put_tag(skb, vlan_proto, vlanid); - } -} - /** * stmmac_rx_refill - refill used skb preallocated buffers * @priv: driver private structure @@ -5418,9 +5400,7 @@ static void stmmac_dispatch_skb_zc(struct stmmac_priv= *priv, u32 queue, if (priv->hw->hw_vlan_en) /* MAC level stripping. */ stmmac_rx_hw_vlan(priv, priv->hw, p, skb); - else - /* Driver level stripping. */ - stmmac_rx_vlan(priv->dev, skb); + skb->protocol =3D eth_type_trans(skb, priv->dev); =20 if (unlikely(!coe) || !stmmac_has_ip_ethertype(skb)) @@ -5912,9 +5892,6 @@ static int stmmac_rx(struct stmmac_priv *priv, int li= mit, u32 queue) if (priv->hw->hw_vlan_en) /* MAC level stripping. */ stmmac_rx_hw_vlan(priv, priv->hw, p, skb); - else - /* Driver level stripping. */ - stmmac_rx_vlan(priv->dev, skb); =20 skb->protocol =3D eth_type_trans(skb, priv->dev); =20 @@ -7995,9 +7972,8 @@ static int __stmmac_dvr_probe(struct device *device, ndev->features |=3D ndev->hw_features | NETIF_F_HIGHDMA; ndev->watchdog_timeo =3D msecs_to_jiffies(watchdog); #ifdef STMMAC_VLAN_TAG_USED - /* Both mac100 and gmac support receive VLAN tag detection */ - ndev->features |=3D NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_STAG_RX; if (dwmac_is_xmac(priv->plat->core_type)) { + ndev->features |=3D NETIF_F_HW_VLAN_CTAG_RX; ndev->hw_features |=3D NETIF_F_HW_VLAN_CTAG_RX; priv->hw->hw_vlan_en =3D true; } --=20 2.43.0