iwn firmware instability with an up-to-date stable kernel

[Olivier Cochard-Labbé]

Hi,

I meet instability with an up-to-date stable 8 kernel and iwn drivers:
About twice a day, my wireless connection hang and I've this error
message in dmesg:

firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207030000
  branch link     = 0x000050F2000004C2
  interrupt link  = 0x000006DE000018B8
  time            = 2103860338
driver status:
  tx ring  0: qid=0  cur=19  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=2   queued=0
  tx ring  4: qid=4  cur=234 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=0   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
  rx ring: cur=52

Does anyone meet the same problem ?

More information about my kernel and device (Dell Latitude D630):

uname -a
FreeBSD d630.bsdrp.net 8.0-STABLE FreeBSD 8.0-STABLE #66: Tue Apr 13
02:16:26 CEST 2010
root at d630.bsdrp.net:/usr/obj/usr/src/sys/DellD630  amd64

dmesg
iwn0: <Intel(R) PRO/Wireless 4965BGN> mem 0xf6cfe000-0xf6cfffff irq 17
at device 0.0 on pci12
iwn0: MIMO 2T3R, MoW2, address 00:1d:e0:72:10:01
iwn0: [ITHREAD]
iwn0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
iwn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
iwn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps
24Mbps 36Mbps 48Mbps 54Mbps

pciconf
iwn0 at pci0:12:0:0:	class=0x028000 card=0x11218086 chip=0x42298086
rev=0x61 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Intel Wireless WiFi Link 4965AGN(supporting
802.11a/b/g/Draft-N) (Intel 4965AGN)'
    class      = network

Thanks,

Olivier