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

[Lukas Wunner]

On Thu, Nov 02, 2023 at 10:26:31AM -0500, Mario Limonciello wrote:
> 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.
> 
> It's only for a device connected to an Intel TBT3 controller though; it
> won't apply to USB4.

Time to resurrect this patch here...? :)

https://lore.kernel.org/all/20220204182820.130339-3-mario.limonciello@xxxxxxx/