From patchwork Thu Feb 4 11:21:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joakim Zhang X-Patchwork-Id: 12067071 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,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 41957C433E0 for ; Thu, 4 Feb 2021 11:22:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E18BE64F43 for ; Thu, 4 Feb 2021 11:22:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235727AbhBDLWm (ORCPT ); Thu, 4 Feb 2021 06:22:42 -0500 Received: from mail-eopbgr140074.outbound.protection.outlook.com ([40.107.14.74]:47262 "EHLO EUR01-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S235653AbhBDLWe (ORCPT ); Thu, 4 Feb 2021 06:22:34 -0500 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=gh3r1wL0PkPqBONnBxhon+U1VgNA5E5AhpMpEkssXo4NRuOcj0+F0QzeQK58GaabqqBGehRDQBf4xbg8cbxevZSlUN27v4QxZhz2MJ0V9fvvRs91lPYCy4lJo9kdAj17T4qk6JlH1f0X90yR1RavurJGvLvnpPKaEx7UJWvFZsVQI2h4ZhU5QjdQdAgdjieJ8nCfhOFk7cgAPE85cXbKiPLGk+X5ay11ws56iTl0ByUVh4vjFZVd7CRRriVzPj6i26ICJPzfh/vJywl1ItZQ47h/kqS26aLNZffjNC9J37W0VknhDrrAx61CgtXzvOLlb6C1F9V7/C5VDwHxkifRGg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=uvY4SXst9mvSQ73QepaPMdp5mAe89Cw6XdSkVbFx0e4=; b=knHseEFQFpudiWkXgqY+tcyJ7GN/JSSWdFAcDFN39pgy9C2oa6LQmpbC1zTuz/v8Vcz8avoLeMHFEGPbE4jMU6hBbgu701/iMCHcWrR7per5kvhGy02sa+/mYXcFI70uBxb4/M9UfjBjN4X0N/HwCYo45IuF3i7xgc4tC5nxLbte9wuohLJ0QPtQpBKMmBYut0KIg6zaXEgjkgp54mZh1mzvyeCunoZZJnDZhZFw4Mn2DBktMeiRb9nNrqFPmjtdwdqb4UnfKmjqSPyJVYjfQigmGgZDPR0+JNB0Wknb8tm/FBoqVpjM6elP4uYRxnO0DXL13Rf4MKbrutLs3Za4Qw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=uvY4SXst9mvSQ73QepaPMdp5mAe89Cw6XdSkVbFx0e4=; b=fZTVb/nyjutmpR926/OukUoHfDwe2Udg1g6nOpia+Z/perDqXUhYrxQD5SO67y1fKPWj3eT84YzNGTy/wIOrnr+o0hqJtsM92Ant3xTzg4Hewj+DdZUOzGHOqSjjiiA34OC7olHCMz5TAntsDf6a1Vr7g+D85zVWy+Tfp2/rj/w= Authentication-Results: st.com; dkim=none (message not signed) header.d=none;st.com; dmarc=none action=none header.from=nxp.com; Received: from VI1PR04MB6800.eurprd04.prod.outlook.com (2603:10a6:803:133::16) by VI1PR04MB6157.eurprd04.prod.outlook.com (2603:10a6:803:f2::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3805.24; Thu, 4 Feb 2021 11:21:45 +0000 Received: from VI1PR04MB6800.eurprd04.prod.outlook.com ([fe80::6958:79d5:16bf:5f14]) by VI1PR04MB6800.eurprd04.prod.outlook.com ([fe80::6958:79d5:16bf:5f14%9]) with mapi id 15.20.3825.019; Thu, 4 Feb 2021 11:21:45 +0000 From: Joakim Zhang To: peppe.cavallaro@st.com, alexandre.torgue@st.com, joabreu@synopsys.com, davem@davemloft.net, kuba@kernel.org Cc: netdev@vger.kernel.org, linux-imx@nxp.com Subject: [PATCH V4 net 2/5] net: stmmac: fix watchdog timeout during suspend/resume stress test Date: Thu, 4 Feb 2021 19:21:41 +0800 Message-Id: <20210204112144.24163-3-qiangqing.zhang@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210204112144.24163-1-qiangqing.zhang@nxp.com> References: <20210204112144.24163-1-qiangqing.zhang@nxp.com> X-Originating-IP: [119.31.174.71] X-ClientProxiedBy: SG2PR03CA0128.apcprd03.prod.outlook.com (2603:1096:4:91::32) To VI1PR04MB6800.eurprd04.prod.outlook.com (2603:10a6:803:133::16) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.71) by SG2PR03CA0128.apcprd03.prod.outlook.com (2603:1096:4:91::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3846.11 via Frontend Transport; Thu, 4 Feb 2021 11:21:42 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 69332026-f6a1-4718-0b04-08d8c8ff0e06 X-MS-TrafficTypeDiagnostic: VI1PR04MB6157: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7691; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:VI1PR04MB6800.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(346002)(376002)(136003)(366004)(39860400002)(396003)(86362001)(69590400011)(8936002)(6486002)(1076003)(16526019)(956004)(2906002)(5660300002)(316002)(66556008)(26005)(186003)(2616005)(8676002)(4326008)(6512007)(15650500001)(66476007)(478600001)(83380400001)(52116002)(6506007)(36756003)(66946007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 69332026-f6a1-4718-0b04-08d8c8ff0e06 X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB6800.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Feb 2021 11:21:45.2757 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: H5WZyz7BZ0GscfzbZXKHypXIyr0iqRtmjIN8h3grGYWaNWNLkl5B5ZkWicWJovpmvMvaDjNzmddByloWuQEepg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB6157 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org stmmac_xmit() call stmmac_tx_timer_arm() at the end to modify tx timer to do the transmission cleanup work. Imagine such a situation, stmmac enters suspend immediately after tx timer modified, it's expire callback stmmac_tx_clean() would not be invoked. This could affect BQL, since netdev_tx_sent_queue() has been called, but netdev_tx_completed_queue() have not been involved, as a result, dql_avail(&dev_queue->dql) finally always return a negative value. __dev_queue_xmit->__dev_xmit_skb->qdisc_run->__qdisc_run->qdisc_restart->dequeue_skb: if ((q->flags & TCQ_F_ONETXQUEUE) && netif_xmit_frozen_or_stopped(txq)) // __QUEUE_STATE_STACK_XOFF is set Net core will stop transmitting any more. Finillay, net watchdong would timeout. To fix this issue, we should call netdev_tx_reset_queue() in stmmac_resume(). Fixes: 54139cf3bb33 ("net: stmmac: adding multiple buffers for rx") Signed-off-by: Joakim Zhang --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 26b971cd4da5..12ed337a239b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -5257,6 +5257,8 @@ static void stmmac_reset_queues_param(struct stmmac_priv *priv) tx_q->cur_tx = 0; tx_q->dirty_tx = 0; tx_q->mss = 0; + + netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue)); } }