From patchwork Tue Jun 8 18:26:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 457594 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=-18.9 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, URIBL_BLOCKED, 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 BAD99C48BCD for ; Tue, 8 Jun 2021 19:05:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A555B610A1 for ; Tue, 8 Jun 2021 19:05:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235676AbhFHTHm (ORCPT ); Tue, 8 Jun 2021 15:07:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:48210 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237745AbhFHTFR (ORCPT ); Tue, 8 Jun 2021 15:05:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id D02756191C; Tue, 8 Jun 2021 18:46:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623177975; bh=NFA6GGpQmVNpgmfw4++B6ztSPKh4O+tlAWGEX2iWNpA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0tJ78nzZ9eLXwvAvbO2x48eC1lYhG+vsmby8usNifD6wayclLcZ2I+NyZuR2XZ50B LyzjtF/ZF+COiQGQUHa0OhdIGYqnRabK/zDhSBKN8tgZdslDi5cigm8YTNZh8I71hM ZrUedrg1qbfhVMWH5XPPZ6cQCfZv9vUr4KmXRkZI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vladimir Oltean , "David S. Miller" , Sasha Levin Subject: [PATCH 5.12 030/161] net: dsa: tag_8021q: fix the VLAN IDs used for encoding sub-VLANs Date: Tue, 8 Jun 2021 20:26:00 +0200 Message-Id: <20210608175946.466247710@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210608175945.476074951@linuxfoundation.org> References: <20210608175945.476074951@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Vladimir Oltean [ Upstream commit 4ef8d857b5f494e62bce9085031563fda35f9563 ] When using sub-VLANs in the range of 1-7, the resulting value from: rx_vid = dsa_8021q_rx_vid_subvlan(ds, port, subvlan); is wrong according to the description from tag_8021q.c: | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | +-----------+-----+-----------------+-----------+-----------------------+ | DIR | SVL | SWITCH_ID | SUBVLAN | PORT | +-----------+-----+-----------------+-----------+-----------------------+ For example, when ds->index == 0, port == 3 and subvlan == 1, dsa_8021q_rx_vid_subvlan() returns 1027, same as it returns for subvlan == 0, but it should have returned 1043. This is because the low portion of the subvlan bits are not masked properly when writing into the 12-bit VLAN value. They are masked into bits 4:3, but they should be masked into bits 5:4. Fixes: 3eaae1d05f2b ("net: dsa: tag_8021q: support up to 8 VLANs per port using sub-VLANs") Signed-off-by: Vladimir Oltean Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/dsa/tag_8021q.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c index 008c1ec6e20c..122ad5833fb1 100644 --- a/net/dsa/tag_8021q.c +++ b/net/dsa/tag_8021q.c @@ -64,7 +64,7 @@ #define DSA_8021Q_SUBVLAN_HI_SHIFT 9 #define DSA_8021Q_SUBVLAN_HI_MASK GENMASK(9, 9) #define DSA_8021Q_SUBVLAN_LO_SHIFT 4 -#define DSA_8021Q_SUBVLAN_LO_MASK GENMASK(4, 3) +#define DSA_8021Q_SUBVLAN_LO_MASK GENMASK(5, 4) #define DSA_8021Q_SUBVLAN_HI(x) (((x) & GENMASK(2, 2)) >> 2) #define DSA_8021Q_SUBVLAN_LO(x) ((x) & GENMASK(1, 0)) #define DSA_8021Q_SUBVLAN(x) \