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De Francesco" , Terry Bowman , Robert Richter Subject: [PATCH v5 12/14] cxl/region: Add a dev_warn() on registration failure Date: Mon, 28 Apr 2025 23:43:15 +0200 Message-ID: <20250428214318.1682212-13-rrichter@amd.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250428214318.1682212-1-rrichter@amd.com> References: <20250428214318.1682212-1-rrichter@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000989EB:EE_|CH2PR12MB4054:EE_ X-MS-Office365-Filtering-Correlation-Id: 41e87d39-1766-4acc-cacb-08dd869dd95e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|36860700013|7416014|82310400026|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?W8wItRkI2Q4MiSqhsoe4iYTNrB64mXZZKN8AoFXePh2vxlSvknC41O1Ya132?= =?us-ascii?Q?V6rAPZgMzhdlKi/HKf+lXKMtghHXA8zYjqPP0L69r/bZ6i0WmtG3ejh6H1DG?= =?us-ascii?Q?bVOtaQZcKSybMM0RYYWWpaAKGQKr+vAK7NHL/iwVomSz84eFEqlbJtQzJnP8?= =?us-ascii?Q?9EW0MASysgIgm/CKr8sXvX55Yd1lyd7OwY0+g5ucjW6uWA+YpGG9LpRy/t1i?= =?us-ascii?Q?QE8sDcM7seKbgtEvvD/EZ5Oe59e4FhS6J5V4Ctv7ha7qQQ9frYXsdJdQkxEV?= =?us-ascii?Q?2ntlrXzpah5aQJ/tN0Wnqf077/k6op94cIrGItX066y3yMt1nASU2PZYcjcB?= =?us-ascii?Q?tLnuMJqsaEwt6UWtIzdXgq5x2DfuD6ssQQChoZti9NW3Wn8cf85+pJpThBC+?= =?us-ascii?Q?MF5Hft2DEciZ4Xklp4JNDDDekSa2Tgi4q3jdESfqaCADs889ofnvFZIuw2bW?= =?us-ascii?Q?5r/002yxPbaL0uysvdIdsHg5kQ6FnJ0o3Y2g1HNgv+oJrTrNmmz5SjoS/IaZ?= =?us-ascii?Q?tlkaE08ird4guGo1fhG7Qr47Sajci/AQG1DKTCYjtt93bD7R2Kyd7fcdx2dc?= =?us-ascii?Q?SVChwrrNa2O1MKiZBuuWh6zNZqX7lpiqzUuAzbovuZ3V2prtutm0dbwJ00+1?= =?us-ascii?Q?WeobHkaNGQ0f5A8iqsyK2IHLHQIScFVkTY3+/CtAOPWaZ3uqqipzY5PbLyqG?= =?us-ascii?Q?4a1jCYWlojKcJcAgxPkeosUHoqePKWHzQ/UcSJXrM7pAP7yE+12e12FG5gWr?= =?us-ascii?Q?mbsl14VzDzAn0YJci8XWpblt5lgRXJ4mKNXTxbdF0JQ/KL/FR69FBn+A2n8Q?= =?us-ascii?Q?CN92muD39YCzNhDP9yHeUld4Gu1MLKksiPjXTq2/znbxyta+za5rA9Mp/Eap?= =?us-ascii?Q?UGLBE7R3vLkJiS50JvVFP9RPZbcLqZO5xqyTsDoo/5BZymXak7zEnYpDKuzS?= =?us-ascii?Q?4vZw+Go75OCBgPgB/2hIheTsbY+Cqt0TCnLQeKLm/8BaHAh38pOZwwGaDZuj?= =?us-ascii?Q?yPLAHT4qYk0/mUO7v7Aeb3Ea1AsdeEq00p/6Qx/h2b8OyHK7dpY6+SVMGMHg?= =?us-ascii?Q?Pj/uZowkqPkgPyT+/otWggCsJeDpwWJbUHXH4xKZBMVCB6JnAniZp8xfsKyz?= =?us-ascii?Q?+0hN4RWILTx6fWxHsG/5KLHUf0aOhCHMdkDy1yO0TbAu3VdLGUQ/yIgq9kvq?= =?us-ascii?Q?88LlFWWuOuplLoyGwP4YbGUPxEetVoWiQ6Lm7oYFKfyeWYt8NZDlBM33BNqq?= =?us-ascii?Q?X3cN40rYHDwu4rLvyv2f8A9gLluyPkJhnsi3rsAruAhhG54VN6wxyQCRLrs8?= =?us-ascii?Q?3BD7YXBIbkx3YZPrz7nxR58AwqrqDva2xSO9rscMEBS6SQ6LrI/ZrwfNEu47?= =?us-ascii?Q?mOhtZh3aHRJwcLxSdFqdwStKPa4sZ1WWi4WPpHyBzbL8atnqI1thiEoAo/3e?= =?us-ascii?Q?5OcNGetIVyeGKIFtE4B8cVm4H7fMe9A1D4X3eHtbfS5s10nUI/49p0qLqWAY?= =?us-ascii?Q?yL4GKBmzUQq+dAeuL02JZ5tJksGXaUhj888O?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(376014)(36860700013)(7416014)(82310400026)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Apr 2025 21:44:26.9795 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 41e87d39-1766-4acc-cacb-08dd869dd95e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000989EB.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4054 Content-Type: text/plain; charset="utf-8" Esp. in complex system configurations with multiple endpoints and interleaving setups it is hard to detect region setup failures as its registration may silently fail. Add messages to show registration failures. Example log message: cxl region5: region sort successful cxl region5: mem0:endpoint5 decoder5.0 add: mem0:decoder5.0 @ 0 next: non= e nr_eps: 1 nr_targets: 1 cxl_port endpoint5: decoder5.0: range: 0x22350000000-0x2634fffffff iw: 1 = ig: 256 cxl region5: pci0000:e0:port1 decoder1.2 add: mem0:decoder5.0 @ 0 next: m= em0 nr_eps: 1 nr_targets: 1 cxl region5: pci0000:e0:port1 iw: 1 ig: 256 cxl region5: pci0000:e0:port1: decoder1.2 expected 0000:e0:01.2 at 0 cxl endpoint5: failed to attach decoder5.0 to region5: -6 cxl_port endpoint5: probe: 0 Signed-off-by: Robert Richter Reviewed-by: Gregory Price Reviewed-by: Jonathan Cameron Reviewed-by: Dave Jiang Reviewed-by: Dan Williams Reviewed-by: Alison Schofield Reviewed-by: Fabio M. De Francesco Tested-by: Gregory Price --- drivers/cxl/core/region.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index ef5408301714..560c447d8136 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2169,6 +2169,12 @@ static int attach_target(struct cxl_region *cxlr, rc =3D cxl_region_attach(cxlr, cxled, pos); up_read(&cxl_dpa_rwsem); up_write(&cxl_region_rwsem); + + if (rc) + dev_warn(cxled->cxld.dev.parent, + "failed to attach %s to %s: %d\n", + dev_name(&cxled->cxld.dev), dev_name(&cxlr->dev), rc); + return rc; } =20 --=20 2.39.5