iwn0: iwn_intr: fatal firmware error (10-STABLE + iwn2230)

Hi all!

I got this firmware crash with 10-STABLE + backported iwn patches from CURRENT:

iwn0: device timeout
wlan0: link state changed to UP
wlan0: link state changed to DOWN
wlan0: link state changed to UP
iwn0: device timeout
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "UNKNOWN" (0x0000102C)
  program counter = 0x0000D978
  source line     = 0x000006A4
  error data      = 0x000000FE00000000
  branch link     = 0x0000D88A0000D88A
  interrupt link  = 0x0000EC7A00000000
  time            = 17657601
driver status:
  tx ring  0: qid=0  cur=2   queued=2
  tx ring  1: qid=1  cur=0   queued=0
  tx ring  2: qid=2  cur=0   queued=0
  tx ring  3: qid=3  cur=0   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=18  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=36
wlan0: link state changed to DOWN
wlan0: link state changed to UP
wlan0: link state changed to DOWN
iwn0: device timeout

The hardware is:

iwn0_at_pci0:4:0:0:        class=0x028000 card=0x40628086 chip=0x08878086
rev=0xc4 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Centrino Wireless-N 2230'
    class      = network

Attached the patch, that I use to support 2230 in 10-STABLE.

And attached the output of:
git diff op/stable/10/iwn origin/master -- sys/dev/iwn/ as
iwn_-_10_-_current.diff
and
git diff op/stable/10/iwn origin/master -- sys/dev/net80211/ as
net80211_-_10_-_current.diff

The git repo mirrored from FreeBSD's github repo.