Reminds me of a company I used to work for where when we updated our PCIe NICs, we would never, ever change the PCIe device or sub-device ID. This was to avoid

Reminds me of a company I used to work for where when we updated our PCIe NICs, we would never, ever change the PCIe device or sub-device ID. This was to avoid a triggering a re-certification from various companies (MS WHQL, Vmware ESX testing, etc). The first thing the driver did was to talk to the firmware and ask it for a set of supported features..