Disable Airtime Fairness and Wi-Fi Multimedia WMM even with reboot

Hello all,

I need to disable Airtime Fairness and Wi-Fi Multimedia (WMM).
For Airtime Fairness it seems I need to set to 0 here:
echo 0 > /sys/kernel/debug/ieee80211/phy1/ath9k/airtime_flags
However, once I reboot the router, it becomes 7 (on) again. Is there a way to disable it even if the router is rebooted?

Also, where can I do the same for WMM?

Thank you!

Do you know that 802.11ac requires WMM, as far as I know?

For example:

802.11ac (like 11n) requires the WLAN to have AES encryption (or Open) and WMM

802.11ac standard requires WMM, protocol itself does not.

i remember having some builds several years ago, where upon disabling WMM i could still connect with HT rates. that was easily observed in airodump where absence of e symbol next to bitrate confirmed that.

I really don't need WMM, and the light manufacturer is suggesting to at least try to disable it.
I was able to disable WMM via LuCI, but Airtime Fairness is returning to 7 (on) after reboot and I'd like to keep it 0 (off) even after rebooting. I don't know where to permanently change it.

Put a command in /etc/rc.local ?