wifi no longer working on FreeBSD release 9.0

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I recently upgraded from rel-7.4 to rel-9.0. My wifi stopped working (ifconfig status: no carrier)

Using Atheros based AR5416 tp-link wn-951 which was working flawlewssly on previous system (rel-7.4).

My /etc/rc.conf.local:

Code: 
  # ifconfig_ath0_name="wlan0"     # not recognized by freebsd 9
  hostapd_enable=yes
  wlans_ath0="wlan0"
  create_args_wlan0="wlanmode hostap" # freebsd 9
  ifconfig_wlan0="up ssid ingeBSD mode 11ng" # mediaopt hostap"

My /etc/hostapd.conf:

Code: 
  interface=wlan0
  ctrl_interface=/var/run/hostapd
  ssid=ingeBSD

  # sets the hostapd to use wpa and wpa2
  wpa=3

  wpa_passphrase=12345679
  wpa_key_mgmt=WPA-PSK
  wpa_pairwise=CCMP TKIP
  dump_file=/var/log/hostapd.log

Apart from the lines commented above, hardly anything else changed from previous config. Am I missing something here?
 
Turned out later that this line prevents the card to working properly:

Code: 
ifconfig_wlan0="up ssid ingeBSD mode 11ng"

After deleting it (actually only the last two words that really matters), my AP rolls on smoothly. But wait, the only reason for me to upgrade is because I thought (or have been told) that there should be a better wifi support in REL9. Not in this case, I guess 802.11n still out of reach.

After some googling, I put ATH_ENABLE_11N and then recompiled the kernel (splitting my hairs for hours before I found out that "WITHOUT_CLANG" is pretty mandatory for kernel9 to be
successfully compiled).

And don't forget that for now, we have to disable ampdutx.

Voila! My kid's netbook (Broadcom) connects at 72Mbps, Win7 client (RTL8191SE) connect up to 120Mbps. WinXP (495AGN): 130Mbps, though unstable, disconnected in mode ht/40-, but atheros AR9085 get connected steadily at 150Mbps!

I did some simple tests, file transfer speed between computer increased at least double. It's really worth it!
 
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