HEAD i386 r336217 : wireless connection fails ( ath(4) )

 I'm experiencing wireless connection failure after HEAD/i386 update performed 
today.
Below is relevant portion of dmesg buffer:


Jul 12 18:43:39 desktop kernel: wlan0: Ethernet address: 18:a6:f7:8a:b1:52
Jul 12 18:43:39 desktop kernel: wlan0: link state changed to UP
Jul 12 18:43:39 desktop kernel: wlan0: link state changed to DOWN
Jul 12 18:43:41 desktop wpa_supplicant[257]: wlan0: Trying to associate with 
f8:1a:67:56:16:16 (SSID='****' freq=2412 MHz)
Jul 12 18:43:41 desktop wpa_supplicant[257]: wlan0: Associated with f8:1a:
67:56:16:16
Jul 12 18:43:41 desktop kernel: wlan0: link state changed to UP
Jul 12 18:43:41 desktop dhclient[641]: New IP Address (wlan0): 192.168.0.50
Jul 12 18:43:41 desktop dhclient[642]: New Subnet Mask (wlan0): 255.255.255.0
Jul 12 18:43:41 desktop dhclient[643]: New Broadcast Address (wlan0): 
192.168.0.255
Jul 12 18:43:41 desktop dhclient[644]: New Routers (wlan0): 192.168.0.1
Jul 12 18:43:42 desktop wpa_supplicant[257]: wlan0: CTRL-EVENT-DISCONNECTED 
bssid=f8:1a:67:56:16:16 reason=1 locally_generated=1
Jul 12 18:43:42 desktop kernel: wlan0: link state changed to DOWN
Jul 12 18:43:42 desktop wpa_supplicant[257]: ioctl[SIOCS80211, op=20, val=0, 
arg_len=7]: Can't assign requested address
Jul 12 18:43:45 desktop wpa_supplicant[257]: wlan0: Trying to associate with 
f8:1a:67:56:16:16 (SSID='****' freq=2412 MHz)
Jul 12 18:43:45 desktop wpa_supplicant[257]: wlan0: Associated with f8:1a:
67:56:16:16
Jul 12 18:43:45 desktop kernel: wlan0: link state changed to UP
Jul 12 18:43:45 desktop dhclient[269]: send_packet: No buffer space available
Jul 12 18:43:46 desktop wpa_supplicant[257]: wlan0: CTRL-EVENT-DISCONNECTED 
bssid=f8:1a:67:56:16:16 reason=1 locally_generated=1
Jul 12 18:43:46 desktop kernel: wlan0: link state changed to DOWN
Jul 12 18:43:46 desktop wpa_supplicant[257]: ioctl[SIOCS80211, op=20, val=0, 
arg_len=7]: Can't assign requested address
Jul 12 18:43:49 desktop wpa_supplicant[257]: wlan0: Trying to associate with 
f8:1a:67:56:16:16 (SSID='****' freq=2412 MHz)
Jul 12 18:43:49 desktop kernel: wlan0: link state changed to UP
Jul 12 18:43:49 desktop wpa_supplicant[257]: wlan0: Associated with f8:1a:
67:56:16:16
Jul 12 18:43:49 desktop dhclient[269]: send_packet: No buffer space available
Jul 12 18:43:50 desktop wpa_supplicant[257]: wlan0: CTRL-EVENT-DISCONNECTED 
bssid=f8:1a:67:56:16:16 reason=1 locally_generated=1
Jul 12 18:43:50 desktop kernel: wlan0: link state changed to DOWN
Jul 12 18:43:50 desktop wpa_supplicant[257]: wlan0: CTRL-EVENT-SSID-TEMP-
DISABLED id=22 ssid="****" auth_failures=1 duration=10 reason=CONN_FAILED
Jul 12 18:43:50 desktop wpa_supplicant[257]: ioctl[SIOCS80211, op=20, val=0, 
arg_len=7]: Can't assign requested address
Jul 12 18:43:53 desktop wpa_supplicant[257]: wlan0: Trying to associate with 
SSID 'test adhoc'
Jul 12 18:43:53 desktop wpa_supplicant[257]: bsd_set_if_media: SIOCSIFMEDIA 
Device not configured
Jul 12 18:43:53 desktop wpa_supplicant[257]: wpa_driver_bsd_associate: failed 
to set operation mode
Jul 12 18:43:53 desktop wpa_supplicant[257]: wlan0: Association request to the 
driver failed
Jul 12 18:43:53 desktop wpa_supplicant[257]: wlan0: CTRL-EVENT-CONNECTED - 
Connection to 00:00:00:00:00:00 completed [id=-1 id_str=]
Jul 12 18:43:56 desktop dhclient[269]: send_packet: Network is down
Jul 12 18:44:04 desktop dhclient[269]: send_packet: Network is down
Jul 12 18:45:01 desktop dhclient[269]: send_packet: Network is down
Jul 12 18:45:05 desktop dhclient[1739]: New IP Address (wlan0): 192.168.0.50
Jul 12 18:45:05 desktop dhclient[1740]: New Subnet Mask (wlan0): 255.255.255.0
Jul 12 18:45:05 desktop dhclient[1741]: New Broadcast Address (wlan0): 
192.168.0.255
Jul 12 18:45:05 desktop dhclient[1742]: New Routers (wlan0): 192.168.0.1
Jul 12 18:45:06 desktop dhclient[1744]: New Routers (wlan0): 192.168.0.1