From patchwork Mon Mar 15 13:53:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 401386 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED943C43381 for ; Mon, 15 Mar 2021 14:03:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C8DC5601FD for ; Mon, 15 Mar 2021 14:03:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233751AbhCOOCY (ORCPT ); Mon, 15 Mar 2021 10:02:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:36622 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232919AbhCOOAL (ORCPT ); Mon, 15 Mar 2021 10:00:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3075764F37; Mon, 15 Mar 2021 13:59:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816796; bh=nv8CHzVD7f2ZaIXac4duHpgpItPYqcxNlTfWIkDoVNU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PdkalrzG5BYvRGmyhqR6pgJrbT97J7mt7SrWHwt9aUB4rwS0G85Ffm2fewM5C3ZjF Gm7yIeF5CTiYo8xOI3c+31a/IkSG8zKuvClv/ku4GSfhiswT18g59BumaUa4xfo4vn CXK7QpiHEUKBFLoB2P73WzFV1PVrmwsAj4ZCuzpA= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vladimir Oltean , Florian Fainelli , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.10 119/290] net: dsa: tag_lan9303: let DSA core deal with TX reallocation Date: Mon, 15 Mar 2021 14:53:32 +0100 Message-Id: <20210315135545.943540785@linuxfoundation.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315135541.921894249@linuxfoundation.org> References: <20210315135541.921894249@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Greg Kroah-Hartman From: Vladimir Oltean [ Upstream commit 6ed94135f58372cdec34cafb60f7596893b0b371 ] Now that we have a central TX reallocation procedure that accounts for the tagger's needed headroom in a generic way, we can remove the skb_cow_head call. Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/dsa/tag_lan9303.c | 9 --------- 1 file changed, 9 deletions(-) diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c index ccfb6f641bbf..aa1318dccaf0 100644 --- a/net/dsa/tag_lan9303.c +++ b/net/dsa/tag_lan9303.c @@ -58,15 +58,6 @@ static struct sk_buff *lan9303_xmit(struct sk_buff *skb, struct net_device *dev) __be16 *lan9303_tag; u16 tag; - /* insert a special VLAN tag between the MAC addresses - * and the current ethertype field. - */ - if (skb_cow_head(skb, LAN9303_TAG_LEN) < 0) { - dev_dbg(&dev->dev, - "Cannot make room for the special tag. Dropping packet\n"); - return NULL; - } - /* provide 'LAN9303_TAG_LEN' bytes additional space */ skb_push(skb, LAN9303_TAG_LEN);