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Tue, 8 Aug 2023 07:00:29 -0700 From: Asmaa Mnebhi To: Subject: [SRU][F/J:linux-bluefield][PATCH v1 1/2] UBUNTU: SAUCE: mlxbf-gige: Fix kernel panic after reboot Date: Tue, 8 Aug 2023 10:00:24 -0400 Message-ID: <20230808140025.12302-2-asmaa@nvidia.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20230808140025.12302-1-asmaa@nvidia.com> References: <20230808140025.12302-1-asmaa@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002529D:EE_|MN6PR12MB8472:EE_ X-MS-Office365-Filtering-Correlation-Id: 52001518-3e31-415e-3fd8-08db9817dfa4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge1.nvidia.com; CAT:NONE; SFS:(13230028)(4636009)(396003)(136003)(39860400002)(346002)(376002)(451199021)(82310400008)(186006)(1800799003)(46966006)(36840700001)(40470700004)(40480700001)(336012)(40460700003)(2616005)(54906003)(36756003)(4326008)(966005)(316002)(6916009)(7636003)(478600001)(70206006)(6666004)(86362001)(82740400003)(70586007)(356005)(7696005)(41300700001)(1076003)(26005)(107886003)(426003)(8676002)(8936002)(47076005)(4744005)(36860700001)(2906002)(83380400001)(5660300002); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Aug 2023 14:00:50.5404 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 52001518-3e31-415e-3fd8-08db9817dfa4 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.160]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002529D.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN6PR12MB8472 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vlad@nvidia.com, asmaa@nvidia.com, rsasson@nvidia.com Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/2030765 This reverts commit ece26b7a07b173f44e8397bda3219c38455bf3f4. Signed-off-by: Asmaa Mnebhi --- drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c index 7de778bd2e2e..7291ca6627f1 100644 --- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c +++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c @@ -485,7 +485,10 @@ static int mlxbf_gige_remove(struct platform_device *pdev) static void mlxbf_gige_shutdown(struct platform_device *pdev) { - mlxbf_gige_remove(pdev); + struct mlxbf_gige *priv = platform_get_drvdata(pdev); + + writeq(0, priv->base + MLXBF_GIGE_INT_EN); + mlxbf_gige_clean_port(priv); } static const struct acpi_device_id __maybe_unused mlxbf_gige_acpi_match[] = { From patchwork Tue Aug 8 14:00:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Asmaa Mnebhi X-Patchwork-Id: 1818621 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; 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Tue, 8 Aug 2023 07:00:33 -0700 Received: from rnnvmail201.nvidia.com (10.129.68.8) by rnnvmail203.nvidia.com (10.129.68.9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.37; Tue, 8 Aug 2023 07:00:32 -0700 Received: from vdi.nvidia.com (10.127.8.14) by mail.nvidia.com (10.129.68.8) with Microsoft SMTP Server id 15.2.986.37 via Frontend Transport; Tue, 8 Aug 2023 07:00:32 -0700 From: Asmaa Mnebhi To: Subject: [SRU][F/J:linux-bluefield][PATCH v1 2/2] UBUNTU: SAUCE: mlxbf-gige: Fix kernel panic after reboot Date: Tue, 8 Aug 2023 10:00:25 -0400 Message-ID: <20230808140025.12302-3-asmaa@nvidia.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20230808140025.12302-1-asmaa@nvidia.com> References: <20230808140025.12302-1-asmaa@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EDD2:EE_|BY5PR12MB4147:EE_ X-MS-Office365-Filtering-Correlation-Id: 24e4770d-1b3e-4c2e-7417-08db9817e00e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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SFS:(13230028)(4636009)(396003)(346002)(376002)(136003)(39860400002)(451199021)(82310400008)(186006)(1800799003)(46966006)(36840700001)(40470700004)(40480700001)(336012)(2616005)(40460700003)(36756003)(4326008)(966005)(316002)(6916009)(7636003)(54906003)(70206006)(356005)(82740400003)(6666004)(86362001)(70586007)(478600001)(7696005)(26005)(1076003)(107886003)(8936002)(426003)(41300700001)(47076005)(8676002)(36860700001)(2906002)(83380400001)(5660300002); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Aug 2023 14:00:51.2364 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 24e4770d-1b3e-4c2e-7417-08db9817e00e X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.161]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EDD2.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4147 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vlad@nvidia.com, asmaa@nvidia.com, rsasson@nvidia.com Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/2030765 We occasionally see a race condition (once every 350 reboots) where napi is still running (mlxbf_gige_poll) while a shutdown has been initiated through "reboot". Since mlxbf_gige_poll is still running, it tries to access a NULL pointer and as a result causes a kernel panic. Add a check for when "priv" is NULL. Signed-off-by: Asmaa Mnebhi --- drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_rx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_rx.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_rx.c index f21dafde490b..75466f713ade 100644 --- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_rx.c +++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_rx.c @@ -298,6 +298,9 @@ int mlxbf_gige_poll(struct napi_struct *napi, int budget) priv = container_of(napi, struct mlxbf_gige, napi); + if (!priv) + return 0; + mlxbf_gige_handle_tx_complete(priv); data = readq(priv->base + MLXBF_GIGE_RX_DMA);