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Thu, 15 Oct 2026 17:39:47 +0000 Date: Thu, 15 Oct 2026 10:39:43 -0700 From: Alison Schofield To: Dave Jiang CC: =?utf-8?B?6buE6auY5b2s?= , Richard Cheng , , Davidlohr Bueso , Jonathan Cameron , Vishal Verma , Dan Williams , Ira Weiny , Li Ming , Subject: Re: [PATCH] cxl/mbox: Add the CXL 4.0 command return codes 001Fh and 0020h Message-ID: References: <20261015055048.1765042-1-huanggaobin23@semi.ac.cn> <31c53d8e.42202.1a13eba4ae8.Coremail.huanggaobin23@semi.ac.cn> Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-ClientProxiedBy: BY3PR03CA0026.namprd03.prod.outlook.com (2603:10b6:a03:39a::31) To DS4PPF0BAC23327.namprd11.prod.outlook.com (2603:10b6:f:fc02::9) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS4PPF0BAC23327:EE_|DS7PR11MB6271:EE_ X-MS-Office365-Filtering-Correlation-Id: f6a46180-7660-4783-6ce0-08df2ae34ea3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|23010399003|366016|1800799024|56012099006|260925021911599003|260925021311599003|260925022911599003|11063799006|4143699003|261009223027099003|22082099003|18002099003|10067099003; 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Hi Gaobin, I apologize for the bad suggestion here. So, devices will return codes Linux doesn't recognize and your other patch [1] protects against that. As others responded here, we'll add the new codes when we need them, not before. https://lore.kernel.org/linux-cxl/3ed8f5db3f21c937d8783f31ee6faca3703ba72a.1791949910.git.alison.schofield@intel.com/ -- Alison