From patchwork Fri Feb 7 07:33:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ong Boon Leong X-Patchwork-Id: 1234753 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=intel.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48DRrH3y7Zz9sSD for ; Fri, 7 Feb 2020 18:34:07 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727012AbgBGHeE (ORCPT ); Fri, 7 Feb 2020 02:34:04 -0500 Received: from mga06.intel.com ([134.134.136.31]:47447 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726136AbgBGHeE (ORCPT ); Fri, 7 Feb 2020 02:34:04 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Feb 2020 23:34:03 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,412,1574150400"; d="scan'208";a="311956963" Received: from unknown (HELO bong5-HP-Z440.png.intel.com) ([10.221.118.166]) by orsmga001.jf.intel.com with ESMTP; 06 Feb 2020 23:34:00 -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 , Alexandru Ardelean , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH net v5 2/5] net: stmmac: xgmac: fix incorrect XGMAC_VLAN_TAG register writting Date: Fri, 7 Feb 2020 15:33:40 +0800 Message-Id: <20200207073340.9409-1-boon.leong.ong@intel.com> X-Mailer: git-send-email 2.17.1 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@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;