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dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.160) by CH3PEPF0000000E.mail.protection.outlook.com (10.167.244.42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.382.8 via Frontend Transport; Thu, 3 Sep 2026 19:20:46 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.46; Thu, 3 Sep 2026 12:20:16 -0700 Received: from vdi.nvidia.com (10.126.231.37) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.46; Thu, 3 Sep 2026 12:20:15 -0700 From: Chris Babroski To: , , CC: , Subject: [PATCH v1 0/3] i2c: mlxbf: Fix master GW corruption Date: Thu, 3 Sep 2026 15:19:58 -0400 Message-ID: <20260903192001.114263-1-cbabroski@nvidia.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: rnnvmail202.nvidia.com (10.129.68.7) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PEPF0000000E:EE_|DM6PR12MB4076:EE_ X-MS-Office365-Filtering-Correlation-Id: 75eafb68-6772-4303-231b-08df09f074ed X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|23010399003|36860700016|82310400026|1800799024|11063799006|10067099003|18002099003|56012099006; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: a3gryaYL0aGVOreR/fNVJ9YunZG9geiER4iVo+NyqlX72zs0kYZnsj5fXIY8I46zXMXzvVbtO8oKq7ZHeG4HBlevzzIeLr5YvF8dGYnGXrY58jcq8Smsq+hlqJ5e0yWbQUL5ZxAPaOiyF9b1XAT4tOvIwN3GXyRLFw/Lp3i+g0KTxdQoE4utCyq3SmQH0pdmRXeSJAmsIid03E9vpDeNOscBV4BSJOfDv9b3yNE5Mxt/+tWOf9wmu/bkGiTwQuEl9JtdFJQzzG6X15MNthfkXxo6ukZ+Gf4nCf4wUIS2zGMxUHuN41psxNVTOwF5yVvBcfigzXbAYJGxnub+dZCVFyY1rPYKcDdabXqDeNGkVu6V6DZDVp5uCAG8AptvC3IiDMgVIPbmHnji5r9g4dEuqkF6DiqEf2qFgz9FH7xVKiFImaV3yYnMon58Ayqd7WFD X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Sep 2026 19:20:46.6784 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 75eafb68-6772-4303-231b-08df09f074ed 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: CH3PEPF0000000E.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4076 This patch series fixes a bug that corrupts the slave address used in read phases and cleans up the code to prevent similar corruption scenarios from occurring in the future. When the MLXBF_I2C_F_SMBUS_BLOCK and/or MLXBF_I2C_F_SMBUS_PEC flags are set, the flag bitmask values are shifted and written to the master gateway control register instead of the single-bit flag values. This caused slave address corruption in read phases (unlike write phases which use the data_desc[0] slave address value). Patch 1 fixes this corruption issue by converting the flags to booleans before setting their values in the control register. Patch 2 converts register field accesses from explicit shifts to BIT()/GENMASK()/FIELD_PREP(). Patch 3 removes an unnecessary register write (dead code). Chris Babroski (3): i2c: mlxbf: Fix master GW corruption from unmasked SMBus flags i2c: mlxbf: Use GENMASK()/FIELD_PREP() for GW fields i2c: mlxbf: Remove unused slave GW PEC handling drivers/i2c/busses/i2c-mlxbf.c | 40 +++++++++++++++++----------------- 1 file changed, 20 insertions(+), 20 deletions(-) -- 2.34.1