WIFI urtwn possibly broken on 297561

Dears

I'm testing the CURRENT version on a beaglebone black and have noted the 
follow behavior. On revision 297561 the wifi adapter stops works after a 
pkg update. I did the follow tests.
Using the version 296898 (OK behavior) and 297561 (wrong behavior):

FreeBSD beaglebone 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r296898M: Wed 
Mar 16 23:52:02 BRT 2016 
ota_at_nostromo:/root/crochet/work/obj/arm.armv6/usr/src/sys/BEAGLEBONE-DEBUG 
arm

ping nostromo ==> OK
pkg update       ==> OK
ping nostromo==> OK
network is OK

I have tested using this follows adapters and on both the behavior is 
the same and OK on 296898 :
urtwn0: <vendor 0x0bda product 0x8176, class 0/0, rev 2.00/2.00, addr 2> 
on usbus1
urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R

urtwn0: <vendor 0x0bda product 0x8178, class 0/0, rev 2.00/2.00, addr 2> 
on usbus1
urtwn0: MAC/BB RTL8192CU, RF 6052 2T2R


After update to this version
FreeBSD beaglebone 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r297561: Fri 
Apr  8 00:53:13 BRT 2016 
ota_at_nostromo:/root/crochet/work/obj/arm.armv6/usr/src/sys/BEAGLEBONE-DEBUG 
arm

And I did the same tests using the same adapters and the wifi stops work 
after pkg update.


And a complete log of the test:

Edit /etc/motd to change this login announcement.
% ping nostromo
PING nostromo (192.168.0.26): 56 data bytes
64 bytes from 192.168.0.26: icmp_seq=0 ttl=64 time=98.318 ms
64 bytes from 192.168.0.26: icmp_seq=1 ttl=64 time=3.679 ms
64 bytes from 192.168.0.26: icmp_seq=2 ttl=64 time=58.809 ms
64 bytes from 192.168.0.26: icmp_seq=3 ttl=64 time=5.464 ms
64 bytes from 192.168.0.26: icmp_seq=4 ttl=64 time=10.979 ms
^C
--- nostromo ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 3.679/35.450/98.318/37.431 ms
% su
pkg upApr  8 04:18:24 beaglebone su: ota to root on /dev/ttyu0
daroot_at_beaglebone:/usr/home/ota # pkg update
The package management tool is not yet installed on your system.
Do you want to fetch and install it now? [y/N]: y
Bootstrapping pkg from 
pkg+http://nostromo:8080/repo/101armv6-default/.latest, please wait...
^C
root_at_beaglebone:/usr/home/ota # ping nostromo
PING nostromo (192.168.0.26): 56 data bytes
^C
--- nostromo ping statistics ---
7 packets transmitted, 0 packets received, 100.0% packet loss
root_at_beaglebone:/usr/home/ota # uname -a
FreeBSD beaglebone 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r297561: Fri 
Apr  8 00:53:13 BRT 2016 
ota_at_nostromo:/root/crochet/work/obj/arm.armv6/usr/src/sys/BEAGLEBONE-DEBUG 
arm

this log is for the follow adapter but for the next one the behavior is 
the same

urtwn0: <vendor 0x0bda product 0x8178, class 0/0, rev 2.00/2.00, addr 2> 
on usbus1
urtwn0: MAC/BB RTL8192CU, RF 6052 2T2R

urtwn0: <vendor 0x0bda product 0x8176, class 0/0, rev 2.00/2.00, addr 2> 
on usbus1
urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R


Someone knows whats going on?


Thanks a lot
-Otacílio