QCA6174 showing terrible performance when connecting via WPA3-SAE

[Eric Park]

I had the opportunity to test the connection with another router (Asus 
RT-AX56U) today and it negotiated with WPA2-PSK, PMF default on, on 5 
GHz. I ran a speedtest and got 20 Mbps both up/down.

I then ran the `nmcli connection modify <SSID2> wifi-sec.pmf 1` and 
after reconnecting it connected with PMF disabled. (I think the reason 
it worked this time is because of WPA2-PSK -- there's probably some way 
of making it work with WPA3 APs and `nmcli` but I don't know the correct 
commands to give in order to make that happen.) The speedtest increased 
to 100 Mbps both up/down, and that's the WAN limit -- I'm pretty sure if 
I ran a iperf3 inside the LAN it would've been much faster.

I think the PMF implementation in ath10k, at least for the QCA6174 chip, 
has some issues as it has consistently worsened performance on two out 
of two sample APs I've tested it on.


- Eric