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Box" , Kai-Heng Feng , "Rafael J. Wysocki" , Heiner Kallweit , Chia-Lin Kao , "linux-tegra@vger.kernel.org" , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , linux-nvme@lists.infradead.org References: <7306256a-b380-489b-8248-b774e6d3d80e@nvidia.com> <20260122152903.GA1247682@bhelgaas> <5z7c25nkb35prvax6vq6ud7eaeuhzsswbf7fqvmlgys3xftgwb@odocboejrdrv> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: LO4P123CA0202.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:1a5::9) To LV5PR12MB9754.namprd12.prod.outlook.com (2603:10b6:408:305::12) Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV5PR12MB9754:EE_|CH3PR12MB8725:EE_ X-MS-Office365-Filtering-Correlation-Id: 2241408e-0d20-4042-a423-08de5a6dee47 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|10070799003|366016|1800799024; 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But the Tegra controller driver initiates L2/L3 >> transition, and also turns off the device. So all the NVMe context is >> lost >> during suspend and while resuming, the NVMe driver got confused due to >> lost >> context. >> >> Jon, could you please try the below hack and see if it fixes the issue? >> >> diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c >> index 0e4caeab739c..4b8d261117f5 100644 >> --- a/drivers/nvme/host/pci.c >> +++ b/drivers/nvme/host/pci.c >> @@ -3723,7 +3723,7 @@ static int nvme_suspend(struct device *dev) >>           * state (which may not be possible if the link is up). >>           */ >>          if (pm_suspend_via_firmware() || !ctrl->npss || >> -           !pcie_aspm_enabled(pdev) || >> +           pcie_aspm_enabled(pdev) || >>              (ndev->ctrl.quirks & NVME_QUIRK_SIMPLE_SUSPEND)) >>                  return nvme_disable_prepare_reset(ndev, true); >> This will confirm whether the issue is due to Tegra controller driver >> breaking >> the NVMe driver assumption or not. > > Yes that appears to be working! I will test some more boards to confirm. So yes with the above all boards appear to be working fine. How is this usually coordinated between the NVMe driver and Host controller driver? It is not clear to me exactly where the problem is and if the NVMe is not shutting down, then what should be preventing the Host controller from shutting down. Thanks Jon -- nvpublic