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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 E7E38C33CA1 for ; Wed, 5 Feb 2020 08:55:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4EBF2082E for ; Wed, 5 Feb 2020 08:55:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728158AbgBEIzo (ORCPT ); Wed, 5 Feb 2020 03:55:44 -0500 Received: from mga09.intel.com ([134.134.136.24]:48635 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728107AbgBEIzm (ORCPT ); Wed, 5 Feb 2020 03:55:42 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Feb 2020 00:55:42 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,405,1574150400"; d="scan'208";a="264149194" Received: from unknown (HELO bong5-HP-Z440.png.intel.com) ([10.221.118.166]) by fmsmga002.fm.intel.com with ESMTP; 05 Feb 2020 00:55:39 -0800 From: Ong Boon Leong To: netdev@vger.kernel.org Cc: Tan Tee Min , Voon Weifeng , Giuseppe Cavallaro , Alexandre TORGUE , Jose Abreu , "David S . Miller" , Maxime Coquelin , Joao Pinto , Arnd Bergmann , Alexandru Ardelean , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH net v4 3/6] net: stmmac: xgmac: fix incorrect XGMAC_VLAN_TAG register writting Date: Wed, 5 Feb 2020 16:55:07 +0800 Message-Id: <20200205085510.32353-4-boon.leong.ong@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200205085510.32353-1-boon.leong.ong@intel.com> References: <20200205085510.32353-1-boon.leong.ong@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We should always do a read of current value of XGMAC_VLAN_TAG instead of directly overwriting the register value. Fixes: 3cd1cfcba26e2 ("net: stmmac: Implement VLAN Hash Filtering in XGMAC") Signed-off-by: Ong Boon Leong --- drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c index 2af3ac5409b7..a0e67d178280 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c @@ -569,7 +569,9 @@ static void dwxgmac2_update_vlan_hash(struct mac_device_info *hw, u32 hash, writel(value, ioaddr + XGMAC_PACKET_FILTER); - value = XGMAC_VLAN_VTHM | XGMAC_VLAN_ETV; + value = readl(ioaddr + XGMAC_VLAN_TAG); + + value |= XGMAC_VLAN_VTHM | XGMAC_VLAN_ETV; if (is_double) { value |= XGMAC_VLAN_EDVLP; value |= XGMAC_VLAN_ESVL; @@ -584,7 +586,9 @@ static void dwxgmac2_update_vlan_hash(struct mac_device_info *hw, u32 hash, writel(value, ioaddr + XGMAC_PACKET_FILTER); - value = XGMAC_VLAN_ETV; + value = readl(ioaddr + XGMAC_VLAN_TAG); + + value |= XGMAC_VLAN_ETV; if (is_double) { value |= XGMAC_VLAN_EDVLP; value |= XGMAC_VLAN_ESVL; -- 2.17.1