nhi0: Cannot find Upstream Facing Port

From: Chris Torek <chris.torek_at_gmail.com>
Date: Mon, 15 Jun 2026 06:19:15 UTC 
Noticed that there's some new thunderbolt code. I get this during boot:

pci3: <PCI bus> on pcib3
nhi0: <Generic USB4 NHI> at device 0.0 on pci3
nhi0: Cannot find Upstream Facing Port
nhi0: tb_router_attach_root()  error.  The driver should be loaded at boot

If it helps any, here's some "pciconf -lv" output snippets:

pcib2@pci0:1:0:0:       class=0x060400 rev=0x02 hdr=0x01 vendor=0x8086 device=0x
1136 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Maple Ridge 4C 2020]'
    class      = bridge
    subclass   = PCI-PCI
pcib3@pci0:2:0:0:       class=0x060400 rev=0x02 hdr=0x01 vendor=0x8086 device=0x
1136 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Maple Ridge 4C 2020]'
    class      = bridge
    subclass   = PCI-PCI
pcib4@pci0:2:1:0:       class=0x060400 rev=0x02 hdr=0x01 vendor=0x8086 device=0x
1136 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Maple Ridge 4C 2020]'
    class      = bridge
    subclass   = PCI-PCI

Can include more if needed. System works fine without whatever it's
trying to do (of course, since it wasn't even detected before :-) )

Chris