iwn(4) in -HEAD supporting Centrino Wireless-N 135

Hi all,

  I compiled a fresh kernel from -HEAD and rebooted in the hope that my
laptop's wifi would now be supported (I saw the commit messages in January
about it possibly supporting Centrino Wireless-N 135). However, while
it does attempt to bring the wifi up, the link just goes up and down
and does not work properly.

  Knowing that the BSDs are fairly close and share some code, I did try 
the OpenBSD driver and it works. Is there some code that could be missing
from the FreeBSD iwn(4) to stabilize it? I'd be happy to test any patches.

Kind regards,
Tom

wlan0: no link ......wlan0: link state changed to UP
wlan0 link stage up -> down
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7
wlan0: link state changed to UP
wlan0: link state down -> up
(more DHCPDISCOVER)
wlan0 link stage up -> down

Rise and repeat.

iwn0: <Intel Centrino Wireless-N 135> mem 0xf7900000-0xf7901fff irq 18 at device 0.0 on pci3