an example:

    nvme fw-log /dev/nvme0
    nvme id-ctrl /dev/nvme0 -H | grep Firmware
    nvme fw-download -f firmware.ebin /dev/nvme0
    nvme fw-commit /dev/nvme0 -s 2 -a 3
    nvme fw-log /dev/nvme0

In an unlikely event, may need to change the slot (-s)