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Tue, 1 Jul 2025 08:58:36 +0000 Subject: Re: [Intel-wired-lan] [PATCH v4 2/2] e1000e: ignore uninitialized checksum word on tgp To: Simon Horman , Jacek Kowalski CC: Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , "Jakub Kicinski" , Paolo Abeni , Vlad URSU , , References: <3fb71ecc-9096-4496-9152-f43b8721d937@jacekk.info> <28347e4f-c6a7-4194-8a80-34508891c8ec@jacekk.info> <20250630170034.GM41770@horms.kernel.org> From: "Lifshits, Vitaly" Message-ID: <5e880e1c-2ee0-22e7-8bcf-3ab35280db47@intel.com> Date: Tue, 1 Jul 2025 11:58:29 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.7.1 In-Reply-To: <20250630170034.GM41770@horms.kernel.org> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-ClientProxiedBy: TL2P290CA0003.ISRP290.PROD.OUTLOOK.COM (2603:1096:950:2::20) To DS4PPF814058951.namprd11.prod.outlook.com (2603:10b6:f:fc02::36) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS4PPF814058951:EE_|IA3PR11MB9063:EE_ X-MS-Office365-Filtering-Correlation-Id: e54404d7-6ecd-4443-ea7c-08ddb87d7703 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|1800799024|366016; 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This means >>> that all NVM images must leave the factory with correct checksum and >>> checksum valid bit set. >> >> Unfortunately some systems have left the factory with an uninitialized >> value of 0xFFFF at register address 0x3F (checksum word location). >> So on Tiger Lake platform we ignore the computed checksum when such >> condition is encountered. >> >> Signed-off-by: Jacek Kowalski >> Tested-by: Vlad URSU >> Fixes: 4051f68318ca9 ("e1000e: Do not take care about recovery NVM checksum") >> Cc: stable@vger.kernel.org > > Thanks for the update. > > Reviewed-by: Simon Horman > Reviewed-by: Vitaly Lifshits