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

[Lukas Wunner]

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