Weekly Development report(Jan 22 ~ Jan 26) on the iwlwifi WiFi project

I was still focusing on the problem in PR 276083
<https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276083> which caused a
timeout in iwlwifi firmware during 802.11n (11ng, 11na) association, thus
failing 11n association.

   1. Given the problem could be in an earlier command or a missing
   command, or a flag, etc, I am narrowing down the problem/learning scope.
      - Trying to print hcmds sequences together with some rx/tx calls and
      some mac80211_config_ops calls in Linux kernel.
      - With a separate monitor node to capture traffic packets in air, I
      am trying to understand the workflows near the 11ng hcmd (grp=5, cmd=22).
      - Most likely that hcmd is a response to an 802.11 management packet
      (Action code: Add Block Ack Request) after a success association
in Linux,
      but I need to confirm.
      - Practicing trace-cmd in Linux kernel as well, the learning curve is
      long.
      - Bjoern offered help to take a look at the trace-cmd report as well.
   2. Finished reviewing D43647

-- 
Best Regards,
Cheng Cui