Hi, This is a heads up that an apparent PCI regression has been reported and mistakenly assigned to USB in the kernel bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=220016 Visible symptom is missing USB devices, but the whole controller fails to probe, apparently due to devm_request_mem_region() returning NULL, see drivers/usb/core/hcd-pci.c and usb_hcd_pci_probe(). Same systems also show a similar failure with some AHCI controller. It seems specific to particular ASUS AMD motherboards. Somebody found that disabling CONFIG_PCI_REALLOC_ENABLE_AUTO helps. That's all I know, reporters can be reached via bugzilla. Regards, Michal
