Re: [PATCH 2/2] PCI: Ignore PCIe ports used for tunneling in pcie_bandwidth_available()

[Mario Limonciello]

On 11/2/2023 10:21, Lukas Wunner wrote:
> On Wed, Nov 01, 2023 at 08:14:31PM -0500, Mario Limonciello wrote:
> > Considering this I think it's a good idea to move that creation of the
> > device link into drivers/pci/pci-acpi.c and store a bit in struct pci_device
> > to indicate it's a tunneled port.
> >
> > Then 'thunderbolt' can look for this directly instead of walking all the FW
> > nodes.
> >
> > pcie_bandwidth_available() can just look at the tunneled port bit instead of
> > the existence of the device link.
>
> pci_is_thunderbolt_attached() should already be doing exactly what
> you want to achieve with the new bit.  It tells you whether a PCI
> device is behind a Thunderbolt tunnel.  So I don't think a new bit
> is actually needed.
>
> Thanks,
>
> Lukas

It's only for a device connected to an Intel TBT3 controller though; it 
won't apply to USB4.