DragonFlyBSD

I'm using a Lenovo Thinkad X200s with Intel Ultimate N WiFi Link 5300.

On Dragonfly BSD 3.6.2 it worked perfectly without any errors (and exactly the same configuration). Since 3.7.X and the actual testes 3.8.0RC my WiFi decive throws the following error on every try to load it (also over manual /etc/rc.d/netif restart):

1. dmesg.boot (with rc_debug enabled) ###
   iwn0: iwn_intr: fatal firmware error
   firmware error log:
   error type = "SYSASSERT" (0x00000005)
   program counter = 0x00003130
   source line = 0x00000585
   error data = 0x0000000100000000
   branch link = 0x0000312A0000312A
   interrupt link = 0x0000091600000000
   time = 1270108785
   driver status:
   tx ring 0: qid=0 cur=0 queued=0
   tx ring 1: qid=1 cur=0 queued=0
   tx ring 2: qid=2 cur=0 queued=0
   tx ring 3: qid=3 cur=3 queued=0
   tx ring 4: qid=4 cur=0 queued=0
   tx ring 5: qid=5 cur=0 queued=0
   tx ring 6: qid=6 cur=0 queued=0
   tx ring 7: qid=7 cur=0 queued=0
   tx ring 8: qid=8 cur=0 queued=0
   tx ring 9: qid=9 cur=58 queued=0
   tx ring 10: qid=10 cur=0 queued=0
   tx ring 11: qid=11 cur=0 queued=0
   tx ring 12: qid=12 cur=0 queued=0
   tx ring 13: qid=13 cur=0 queued=0
   tx ring 14: qid=14 cur=0 queued=0
   tx ring 15: qid=15 cur=0 queued=0
   tx ring 16: qid=16 cur=0 queued=0
   tx ring 17: qid=17 cur=0 queued=0
   tx ring 18: qid=18 cur=0 queued=0
   tx ring 19: qid=19 cur=0 queued=0
   rx ring: cur=11

I just load 'iwn5000fw_load="YES"' over loader.conf, because the other modules (if_iwn.ko, wlan_ccmp.ko, wlan_tkip.ko) are loaded by the generic kernel. This is what I've loaded, too:

1. kldstat ###
   Id Refs Address Size Name
   1 28 0xffffffff80200000 15a8710 kernel
   2 1 0xffffffff817a9000 13020 snd_hda.ko
   3 2 0xffffffff817bd000 31bf8 sound.ko
   4 3 0xffffffff817ef000 bf758 acpi.ko
   5 1 0xffffffff818af000 c7a0 ehci.ko
   6 2 0xffffffff818bc000 f4c0 dm.ko
   7 1 0xffffffff818cc000 1c4f8 dm_target_crypt.ko
   8 4 0xffffffff827e9000 58d0 libiconv.ko
   9 1 0xffffffff827ef000 20c8 libmchain.ko
   10 1 0xffffffff827f2000 f98 msdos_iconv.ko
   11 1 0xffffffff827f3000 f88 ntfs_iconv.ko
   12 2 0xffffffff827f4000 10a38 ntfs.ko
   13 1 0xffffffff82805000 fd0 cd9660_iconv.ko
   14 1 0xffffffff82806000 5928 acpi_video.ko
   15 1 0xffffffff8280c000 70c48 drm.ko
   16 2 0xffffffff8287d000 2ec8 iicbus.ko
   17 1 0xffffffff82880000 53fc8 iwn5000fw.ko
   18 1 0xffffffff828d4000 1da8 coretemp.ko
   19 1 0xffffffff828d6000 68d0 acpi_thinkpad.ko
   20 1 0xffffffff828dd000 3dd0 est.ko
   21 1 0xffffffff83042000 35000 pf.ko

1. rc.conf (relevant entries) ###
   wlans_iwn0="wlan0"
   ipv6_enable="YES"
   ipv6_network_interfaces="wlan0"
   ifconfig_wlan0="up DHCP WPA mode 11a"

1. wpa_supplicant.conf ###
   ctrl_interface=/var/run/wpa_supplicant
   eapol_version=2
   network={
   ssid="my SSID name"
   priority=145
   #scan_ssid=1
   proto=RSN
   key_mgmt=WPA-PSK
   pairwise=CCMP
   group=CCMP
   psk="my secure passphrase"
   }

1. sysctl.conf (relevant entries) ###
   net.inet6.ip6.use_tempaddr=1
   net.inet6.icmp6.nodeinfo=0
   net.inet6.icmp6.rediraccept=0

In IRC at #dragonflybsd on EFNet @profmakx wrote: "I have iwn4965 and iwn6000, both work".

I've just tested (just for fun) to replace all that modules (if_iwn.ko, wlan_ccmp.ko, wlan_tkip.ko, iwn5000fw.ko) one by one and all together with the older one from v3.6.2. The result was exactly the same error.

I've found a FreeBSD issue with parallels:
http://www.marshut.com/sinuy/iwn-firmware-sysassert.html

Thanks in advance for any help!