Hi, On Thu, Aug 22, 2024 at 10:56:44AM -0500, Mario Limonciello wrote: > > > Here's the snippet from the kernel log with the patch in place. You can see > > > it flagged 00:02.0 as untrusted and removable, but it definitely isn't. > > > > Is it marked as ExternalFacingPort in the ACPI tables? > > No; it doesn't have an ACPI companion device. Hm, how can it pass this then? static bool pcie_is_tunneled(struct pci_dev *pdev) { ... /* Internal PCIe devices are not tunneled. */ if (!root->external_facing) return false; ... Would you mind adding some debug statements there so we can see (hopefully) what goes wrong? The intention is that pcie_switch_directly_under() is only called on Intel pre-USB4 discrete controllers (well and Maple Ridge as that's still using the Connection Manager firmware).