{"id":2228795,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2228795/?format=json","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=json","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=json","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=json","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 ","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 ","To":", , ,\n\t, , ,\n\t, ","CC":", ,\n\t, ,\n\t, ,\n\t","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":"","List-Subscribe":"","List-Unsubscribe":"","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 \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"]}