From patchwork Sat Mar 20 20:40:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiner Kallweit X-Patchwork-Id: 12152657 X-Patchwork-Delegate: kuba@kernel.org 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=-14.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 1630EC433C1 for ; Sat, 20 Mar 2021 20:40:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D69396191A for ; Sat, 20 Mar 2021 20:40:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229955AbhCTUkX (ORCPT ); Sat, 20 Mar 2021 16:40:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229769AbhCTUkQ (ORCPT ); Sat, 20 Mar 2021 16:40:16 -0400 Received: from mail-wm1-x32e.google.com (mail-wm1-x32e.google.com [IPv6:2a00:1450:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5C1AC061574 for ; Sat, 20 Mar 2021 13:40:15 -0700 (PDT) Received: by mail-wm1-x32e.google.com with SMTP id r10-20020a05600c35cab029010c946c95easo7033290wmq.4 for ; Sat, 20 Mar 2021 13:40:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:message-id:date:user-agent:mime-version :content-language:content-transfer-encoding; bh=CSE0A3maM1250A6VN+ltcoiWT4Tpsq+JuLzbphp/sqQ=; b=CYL+aEejqcNQ6m6ok6orUj3RS6uMJxDcvWZpgZzuztfsZ32eUYIS98AmaFeTLo+FCq IITTXYQY/V3lqO3KyeFVuuIuxPeSazL2Kxzb45ivVt0Kc8oMfkSU8UCZy5JS5Z59jT2y Vx0WH1cuL8TEBeFahzm6Pw2fE9qsD9w6QSNE1cc7dbBFQimatMm7/qvGwaHn8BDlKk34 PHl6rGFQ1n5auFbmMIKdgbKWjOi6gc2A9t+x3416df9odl5f18zk+LMLeyOkrGEQwtRk 9xoQTByi6wpQjxNCyNqKhUeb4Zv+KN1JJnEOiEgogDXDcZBmYsI03INyXxz3ZnNnfiaT rmUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=CSE0A3maM1250A6VN+ltcoiWT4Tpsq+JuLzbphp/sqQ=; b=C+Gk/cr61BdRf/YaRfVqoRILsz35suHKeSt0Rhah0nSyPdU4/12iGG27gXt+dnLdQL DZvGXB1SItjpncroLvtKMrSvKqf0M5Q7JQLT6c7/D+u7DdLvc3bLAF8y94DWQrMCbK7A LiKlS8kfa9Q+eWN0SlDFIzs5pKUBPgjnG7tK50v12whdCeuWtQQeuc8t4Eifl3jy1VbI FekVqSh3qivQLf3XqUdvVmf1LBeAD82OLKHsROC7BMuhBdH8jxGLUSiyhC+D81Qw+W8t MxJR2AiQ2et9AQyCWw9VPZfJhse/Vj5q77mzrZuEzD4+fmdTKDSf/emjOIlyAQc+b7po A89A== X-Gm-Message-State: AOAM532Fo1U/eQCMe6hnAGWFHz52//wr6tzlF2b1tmA/oD8iIbtDOgpt HIGtVaKDvHoffl8NFUErPsYtOt2/5AECSw== X-Google-Smtp-Source: ABdhPJzv8SQKzfQAocnA3o+R2yTXYFtLvbwqqBK0YFOjwmgGTmQg4WsSWaeXRKYo43DUc84NLbT0fA== X-Received: by 2002:a7b:c931:: with SMTP id h17mr9278185wml.4.1616272814559; Sat, 20 Mar 2021 13:40:14 -0700 (PDT) Received: from ?IPv6:2003:ea:8f1f:bb00:1195:d87b:55ef:276? (p200300ea8f1fbb001195d87b55ef0276.dip0.t-ipconnect.de. [2003:ea:8f1f:bb00:1195:d87b:55ef:276]) by smtp.googlemail.com with ESMTPSA id p14sm11966616wmc.30.2021.03.20.13.40.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 20 Mar 2021 13:40:14 -0700 (PDT) From: Heiner Kallweit To: Realtek linux nic maintainers , Jakub Kicinski , David Miller Cc: "netdev@vger.kernel.org" , Paul Blazejowski Subject: [PATCH net] r8169: fix DMA being used after buffer free if WoL is enabled Message-ID: Date: Sat, 20 Mar 2021 21:40:08 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org IOMMU errors have been reported if WoL is enabled and interface is brought down. It turned out that the network chip triggers DMA transfers after the DMA buffers have been freed. For WoL to work we need to leave rx enabled, therefore simply stop the chip from being a DMA busmaster. Fixes: 567ca57faa62 ("r8169: add rtl8169_up") Tested-by: Paul Blazejowski Signed-off-by: Heiner Kallweit --- drivers/net/ethernet/realtek/r8169_main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index 8ea6ddc7d..0d7001303 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -4644,6 +4644,9 @@ static void rtl8169_down(struct rtl8169_private *tp) rtl8169_update_counters(tp); + pci_clear_master(tp->pci_dev); + rtl_pci_commit(tp); + rtl8169_cleanup(tp, true); rtl_prepare_power_down(tp); @@ -4651,6 +4654,7 @@ static void rtl8169_down(struct rtl8169_private *tp) static void rtl8169_up(struct rtl8169_private *tp) { + pci_set_master(tp->pci_dev); phy_resume(tp->phydev); rtl8169_init_phy(tp); napi_enable(&tp->napi); @@ -5305,8 +5309,6 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) rtl_hw_reset(tp); - pci_set_master(pdev); - rc = rtl_alloc_irq(tp); if (rc < 0) { dev_err(&pdev->dev, "Can't allocate interrupt\n");