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GET /api/1.1/patches/2228795/?format=api
{ "id": 2228795, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2228795/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260427121227.290604-1-sai.krishna.musham@amd.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.1/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260427121227.290604-1-sai.krishna.musham@amd.com>", "date": "2026-04-27T12:12:27", "name": "[RESEND] PCI: amd-mdb: Assert PERST# on shutdown", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5d3c23cbd46f042ddf14560097068531622ad95e", "submitter": { "id": 90336, "url": "http://patchwork.ozlabs.org/api/1.1/people/90336/?format=api", "name": "Sai Krishna Musham", "email": "sai.krishna.musham@amd.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260427121227.290604-1-sai.krishna.musham@amd.com/mbox/", "series": [ { "id": 501636, "url": "http://patchwork.ozlabs.org/api/1.1/series/501636/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=501636", "date": "2026-04-27T12:12:27", "name": "[RESEND] PCI: amd-mdb: Assert PERST# on shutdown", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501636/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2228795/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228795/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-pci+bounces-53212-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=amd.com header.i=@amd.com header.a=rsa-sha256\n header.s=selector1 header.b=mwTW3nl6;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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helo=satlexmb07.amd.com; pr=C", "From": "Sai Krishna Musham <sai.krishna.musham@amd.com>", "To": "<bhelgaas@google.com>, <lpieralisi@kernel.org>, <kw@linux.com>,\n\t<mani@kernel.org>, <robh@kernel.org>, <krzk+dt@kernel.org>,\n\t<conor+dt@kernel.org>, <cassel@kernel.org>", "CC": "<linux-pci@vger.kernel.org>, <devicetree@vger.kernel.org>,\n\t<linux-kernel@vger.kernel.org>, <michal.simek@amd.com>,\n\t<bharat.kumar.gogada@amd.com>, <thippeswamy.havalige@amd.com>,\n\t<sai.krishna.musham@amd.com>", "Subject": "[PATCH RESEND] PCI: amd-mdb: Assert PERST# on shutdown", "Date": "Mon, 27 Apr 2026 17:42:27 +0530", "Message-ID": "<20260427121227.290604-1-sai.krishna.musham@amd.com>", "X-Mailer": "git-send-email 2.44.4", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-EOPAttributedMessage": "0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "BL02EPF0001A0FD:EE_|DM4PR12MB6111:EE_", "X-MS-Office365-Filtering-Correlation-Id": "f1322cec-1bfc-4208-5d3f-08dea4564485", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "\n\tBCL:0;ARA:13230040|36860700016|1800799024|7416014|376014|82310400026|18002099003|56012099003;", "X-Microsoft-Antispam-Message-Info": "\n\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", "X-Forefront-Antispam-Report": "\n\tCIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700016)(1800799024)(7416014)(376014)(82310400026)(18002099003)(56012099003);DIR:OUT;SFP:1101;", "X-MS-Exchange-AntiSpam-MessageData-ChunkCount": "1", "X-MS-Exchange-AntiSpam-MessageData-0": "\n\tVrXZvjffSSojUNmBJ9ivXtSrzZP9D5JdHdfNwVIJc8+34KsGkCBW2J2U474IBxF/m3GdX8AGOqm+E6ssWKT3MnIlNvevJL/Rl8P0Bk5WPZCdOGErttaf0AeDPU+r91yFARAnrT7tlinEAPYQ8OPS/Wzi6B2ecPXeTMEj5uBlsphpPGSPrUlo9F0wBV1iBTr7rX4PWxhyrxJ5pBM6ET3vQwoFAEpXwoakw7k77m9hmtifnmmlZ+X0n3sVoDR/ycaImU7sKnGoO+KcMQOdDE5JhBjudSgzm35OIfajd518y/3SB6TbuGHJPGvhTCfjnuel2EOO3mz8T1fkQUHte2DWZjSuZV1LnCXzMXSXX1wPF+QrJsaUWeUr7QRZ6mgf9hX7WGTfXEjFc5MKzp/vtjnvTVdjIoE5/HTZuqUJ277YFuBdm5TPmBf8Z54gab8+iQ30", "X-OriginatorOrg": "amd.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "27 Apr 2026 12:12:35.6559\n (UTC)", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n f1322cec-1bfc-4208-5d3f-08dea4564485", "X-MS-Exchange-CrossTenant-Id": "3dd8961f-e488-4e60-8e11-a82d994e183d", "X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp": "\n TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n\tBL02EPF0001A0FD.namprd03.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "DM4PR12MB6111" }, "content": "Add a shutdown handler for the AMD MDB PCIe host controller that\nasserts the PERST# signal via GPIO before the system powers off or\nreboots. This ensures the connected PCIe endpoint is held in reset\nduring shutdown.\n\nSigned-off-by: Sai Krishna Musham <sai.krishna.musham@amd.com>\n---\n drivers/pci/controller/dwc/pcie-amd-mdb.c | 9 +++++++++\n 1 file changed, 9 insertions(+)", "diff": "diff --git a/drivers/pci/controller/dwc/pcie-amd-mdb.c b/drivers/pci/controller/dwc/pcie-amd-mdb.c\nindex 7e50e11fbffd..69d21b4727e4 100644\n--- a/drivers/pci/controller/dwc/pcie-amd-mdb.c\n+++ b/drivers/pci/controller/dwc/pcie-amd-mdb.c\n@@ -507,6 +507,14 @@ static int amd_mdb_pcie_probe(struct platform_device *pdev)\n \treturn amd_mdb_add_pcie_port(pcie, pdev);\n }\n \n+static void amd_mdb_pcie_shutdown(struct platform_device *pdev)\n+{\n+\tstruct amd_mdb_pcie *pcie = platform_get_drvdata(pdev);\n+\n+\tif (pcie->perst_gpio)\n+\t\tgpiod_set_value_cansleep(pcie->perst_gpio, 1);\n+}\n+\n static const struct of_device_id amd_mdb_pcie_of_match[] = {\n \t{\n \t\t.compatible = \"amd,versal2-mdb-host\",\n@@ -521,6 +529,7 @@ static struct platform_driver amd_mdb_pcie_driver = {\n \t\t.suppress_bind_attrs = true,\n \t},\n \t.probe = amd_mdb_pcie_probe,\n+\t.shutdown = amd_mdb_pcie_shutdown,\n };\n \n builtin_platform_driver(amd_mdb_pcie_driver);\n", "prefixes": [ "RESEND" ] }