ath10k: firmware crash in station mode & problem DFS

[Vu Hai NGUYEN]

>I have a script to build every commit now, but except for the first few
>and the last few images, you would need various driver changes to work with them.

>I can rebase my firmware changes so that hopefully all (or at least most) of the
>images will work on standard kernels, but it may be a few days before I
>can get that done.

>In the meantime, please try these two:

>Compiled from original source received from QCA:

>http://www.candelatech.com/downloads/firmware-2-community-commit-0-207ce4b.bin

>It appeared to me that that code had a regression, so next commit fixed
>that:

>http://www.candelatech.com/downloads/firmware-2-community-commit-1-5717c65.bin

>If either of these work with DFS, then some change I made later broke it, and I can
>build the rest of the images so we can figure out where.

Both firmware in the link that you gave me work well, my station associate directly with the AP after running wpa_supplicant.
But then I re-put your firmware version non commercial, my STA did not associate directly after running wpa_supp, it keep print the message SCAN EVENT STARTED of wlan0. 
I run "iw wlan0 scan" and some times it can see and associate with my AP, some times it can not see the network with channel DFS, I mean it is not stable.

And I had other question too, I thought that you've done some test with ath10k in mode 802.11ac by iperf? What is the maximum rate that you obtain?
I'm using 2 PC and connect each one to my AP and STA, but the max rate that I had is around 120Mbps only, in both 802.11n and 802.11ac.
Strange things is that I config 3 antennas in used and leave the rate automatically (Don't set rates using "iw"), my station dump and file "fw_stats" in debugfs show me the rates of MCS 7 or 15 (in 802.11n) and NSS1 or 2 (in 802.11ac).
It never set in MCS 23 or NSS3, though my module wifi support 3 STREAMS, 1 can see it from "iw list":
VHT RX MCS set:
			1 streams: MCS 0-9
			2 streams: MCS 0-9
			3 streams: MCS 0-9
But it also show me: VHT RX highest supported: 0 Mbps and VHT TX highest supported: 0 Mbps, is there something wrong with it?
If I use "iw" to fixed rate, the info from station dump (TX rates is always false because of firmware issue), but RX rate and the info from "fw_stats" is same thing as what I fixed (I can fixe rate at MCS23 and NSS 3 too, I also verified with dmesg | grep mac to see debug message from ath10k). But as I said above, my rate is around 120 Mbps in iperf.

NGUYEN Vu Hai
Acita-Sodielec
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