On Fri, Jan 23, 2026 at 11:25 PM Christophe Leroy (CS GROUP)
[off-list ref] wrote:

Yes and that's exactly the reason why removing unused IDs will be a problem.

Let's take an exemple: some patch adds PCI_DEVICE_ID_ARECA_1682 after
PCI_DEVICE_ID_ARECA_1681 in pci_ids.h in the mainline. That patch needs
to be backported and it conflicts with PCI_VENDOR_ID_S2IO which is not
anymore in the mainline but is still in stable.

Hi, Christophe,

I understand your reasoning now. Thanks for clarifying. In my opinion,
changes to pci_ids.h don't happen often enough for that to be a
problem. Unused IDs have been removed from it before.

Sincerely,
Ethan