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

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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

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.

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