Bug 176104 - [iwn] iwn0: iwn_intr: fatal firmware error
Summary: [iwn] iwn0: iwn_intr: fatal firmware error
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: wireless (show other bugs)
Version: 10.0-CURRENT
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-wireless (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-02-13 11:40 UTC by Anton Shterenlikht
Modified: 2018-05-28 19:40 UTC (History)
2 users (show)

See Also:


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Description Anton Shterenlikht 2013-02-13 11:40:00 UTC
At some, seemingly random points, the iwn driver
will stop working with this message:

iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207030000
  branch link     = 0x00008370000004C2
  interrupt link  = 0x000006DA000018B8
  time            = 200035
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=2   queued=1
  tx ring  4: qid=4  cur=67  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=13

After that a restart of the network is
required, i.e. /etc/rc.d/netif restart

It seems sometimes flipping the radio
switch a few times will lead to the same
problem.

Sometimes restarting network doesn't help,
and in some cases I have to restart it
3-4-5 times before the iwn works again:

wlan0: link state changed to DOWN
wlan0: link state changed to UP
wlan0: link state changed to DOWN
wlan0: link state changed to UP
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207430000
  branch link     = 0x00008370000004C2
  interrupt link  = 0x000006DA000018B8
  time            = 2357321991
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=79  queued=0
  tx ring  4: qid=4  cur=220 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=12
in6_purgeaddr: err=65, destination address delete failed
wlan0: link state changed to DOWN
wlan0: Ethernet address: 00:21:5c:50:68:c3
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000202030000
  branch link     = 0x00005CEE000004C2
  interrupt link  = 0x000006DE00007386
  time            = 10259240
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=1   queued=0
  tx ring  4: qid=4  cur=41  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=38
in6_purgeaddr: err=65, destination address delete failed
wlan0: Ethernet address: 00:21:5c:50:68:c3
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207030000
  branch link     = 0x00008370000004C2
  interrupt link  = 0x000006DA000018B8
  time            = 200035
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=2   queued=1
  tx ring  4: qid=4  cur=67  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=0
in6_purgeaddr: err=65, destination address delete failed
wlan0: Ethernet address: 00:21:5c:50:68:c3
wlan0: link state changed to UP
wlan0: link state changed to DOWN
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207430000
  branch link     = 0x00008370000004C2
  interrupt link  = 0x000006DE000018B8
  time            = 11958181
driver status:
  tx ring  0: qid=0  cur=229 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=17  queued=1
  tx ring  4: qid=4  cur=109 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=15
in6_purgeaddr: err=65, destination address delete failed
wlan0: Ethernet address: 00:21:5c:50:68:c3
wlan0: link state changed to UP
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207030000
  branch link     = 0x00008370000004C2
  interrupt link  = 0x000006DE000018B8
  time            = 1412239977
driver status:
  tx ring  0: qid=0  cur=41  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=15  queued=0
  tx ring  4: qid=4  cur=81  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=53
in6_purgeaddr: err=65, destination address delete failed
wlan0: link state changed to DOWN
wlan0: Ethernet address: 00:21:5c:50:68:c3
wlan0: link state changed to UP

Fix: 

This has been discussed briefly in this
thread:
http://lists.freebsd.org/pipermail/freebsd-mobile/2013-February/012748.html

It seems 9.1-release is also affected.
How-To-Repeat: 
Build a kernel with
device          iwn             # Intel 4965/1000/5000/6000 wireless NICs.
device iwn4965fw

Initialise the wlan device:

iwn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
        ether 00:21:5c:50:68:c3
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
        status: associated
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 00:21:5c:50:68:c3
        inet 172.21.222.82 netmask 0xfffffc00 broadcast 255.255.255.255
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet OFDM/36Mbps mode 11g
        status: associated
        ssid eduroam channel 1 (2412 MHz 11g) bssid 00:3a:98:62:cd:a0
        country US authmode WPA2/802.11i privacy ON deftxkey UNDEF
        AES-CCM 3:128-bit txpower 14 bmiss 10 scanvalid 450 bgscan
        bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 5 protmode CTS
        wme roaming MANUAL

Then use the wireless and see.
Maybe it crumbles more under load.
Try flipping the radio switch on and off
few times.
Comment 1 Mark Linimon freebsd_committer freebsd_triage 2013-02-13 16:01:42 UTC
Responsible Changed
From-To: freebsd-bugs->freebsd-wireless

Over to maintainer(s).
Comment 2 Anton Shterenlikht 2013-06-24 09:07:42 UTC
This problem still persists in r252033:

iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207030000
  branch link     = 0x00008370000004C2
  interrupt link  = 0x000006DA000018B8
  time            = 200035
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=2   queued=1  
  tx ring  4: qid=4  cur=67  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=5
NVRM: GPU at 0000:01:00: GPU-a1a1491c-c546-eda9-3b1f-54ec998e9441
ifa_del_loopback_route: deletion failed: 48
wlan0: Ethernet address: 00:21:5c:50:68:c3
wlan0: link state changed to UP
wlan0: link state changed to DOWN
iwn0: device timeout


iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207030000
  branch link     = 0x00008370000004C2
  interrupt link  = 0x000006DA000018B8
  time            = 200035
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=2   queued=1  
  tx ring  4: qid=4  cur=67  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=22
ifa_del_loopback_route: deletion failed: 48
wlan0: Ethernet address: 00:21:5c:50:68:c3


iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000202030000
  branch link     = 0x00005CEE000004C2
  interrupt link  = 0x000006DE00007386
  time            = 220366
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=4   queued=0  
  tx ring  4: qid=4  cur=97  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=42
ifa_del_loopback_route: deletion failed: 48
wlan0: Ethernet address: 00:21:5c:50:68:c3

etc.
Comment 3 Hiren Panchasara freebsd_committer 2013-06-24 19:09:18 UTC
Assuming you have 4965 chipset, this seems to be some weird firmware
error. I see many users (including linux) reporting similar issues but
could not find any definitive solution.

At most you can try getting the latest firmware for your chipset and try it out.
Probably from http://wireless.kernel.org/en/users/Drivers/iwlegacy

Good luck,
Hiren
Comment 4 Anton Shterenlikht 2013-06-25 12:48:16 UTC
	From hiren.panchasara@gmail.com Mon Jun 24 19:31:55 2013

	Assuming you have 4965 chipset,

yes, I do:

iwn0@pci0:3:0:0:        class=0x028000 card=0x11108086 chip=0x42308086 rev=0x61 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'PRO/Wireless 4965 AG or AGN [Kedron] Network Connection'
    class      = network

iwn0: <Intel Wireless WiFi Link 4965> mem 0xdf2fe000-0xdf2fffff irq 17 at device 0.0 on pci3

and I have:

device          iwn             # Intel 4965/1000/5000/6000 wireless NICs.
device iwn4965fw

in the kernel config.

	this seems to be some weird firmware
	error. I see many users (including linux) reporting similar issues but
	could not find any definitive solution.

	At most you can try getting the latest firmware for your chipset and try it out.
	Probably from http://wireless.kernel.org/en/users/Drivers/iwlegacy

# cat /usr/src/sys/modules/iwnfw/iwn4965/Makefile 
# $FreeBSD: head/sys/modules/iwnfw/iwn4965/Makefile 201209 2009-12-29 19:47:34Z rpaulo $

KMOD=   iwn4965fw
IMG=    iwlwifi-4965-228.61.2.24

.include <bsd.kmod.mk>
#

According to your link, this is the latest version.
However, there is a question mark (?) against it.
I don't know what it means, perhaps that they are
not sure if it works correctly.
I wonder if an earlier  version should be used instead?

Thanks

Anton
Comment 5 Anton Shterenlikht 2013-06-25 14:28:51 UTC
One thing I noticed is that this problem occurs
more often when running on battery, and less
frequently when running from mains. Could this
be related to some energy saving code?
Comment 6 Hiren Panchasara freebsd_committer 2013-06-25 16:52:43 UTC
On Tue, Jun 25, 2013 at 4:48 AM, Anton Shterenlikht <mexas@bris.ac.uk> wrote:
>         From hiren.panchasara@gmail.com Mon Jun 24 19:31:55 2013
>
>         Assuming you have 4965 chipset,
>
> yes, I do:
>
> iwn0@pci0:3:0:0:        class=0x028000 card=0x11108086 chip=0x42308086 rev=0x61 hdr=0x00
>     vendor     = 'Intel Corporation'
>     device     = 'PRO/Wireless 4965 AG or AGN [Kedron] Network Connection'
>     class      = network
>
> iwn0: <Intel Wireless WiFi Link 4965> mem 0xdf2fe000-0xdf2fffff irq 17 at device 0.0 on pci3
>
> and I have:
>
> device          iwn             # Intel 4965/1000/5000/6000 wireless NICs.
> device iwn4965fw
>
> in the kernel config.
>
>         this seems to be some weird firmware
>         error. I see many users (including linux) reporting similar issues but
>         could not find any definitive solution.
>
>         At most you can try getting the latest firmware for your chipset and try it out.
>         Probably from http://wireless.kernel.org/en/users/Drivers/iwlegacy
>
> # cat /usr/src/sys/modules/iwnfw/iwn4965/Makefile
> # $FreeBSD: head/sys/modules/iwnfw/iwn4965/Makefile 201209 2009-12-29 19:47:34Z rpaulo $
>
> KMOD=   iwn4965fw
> IMG=    iwlwifi-4965-228.61.2.24
>
> .include <bsd.kmod.mk>
> #
>
> According to your link, this is the latest version.
> However, there is a question mark (?) against it.
> I don't know what it means, perhaps that they are
> not sure if it works correctly.
> I wonder if an earlier  version should be used instead?

Yeah, no harm in trying. :-)

cheers,
Hiren
>
> Thanks
>
> Anton
>
>
Comment 7 Michael Gmelin 2013-12-26 17:56:39 UTC
Did you ever find a solution to this? I'm experiencing the same issue
and it's happening way too often to ignore it.
Comment 8 Anton Shterenlikht 2014-04-17 11:33:24 UTC
Still the same in r264294 amd64:

iwn0: <Intel Wireless WiFi Link 4965> mem 0xdf2fe000-0xdf2fffff irq 17 at device 0.0 on pci3

iwn0: device timeout
wlan0: link state changed to UP
wlan0: link state changed to DOWN
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000203430000
  branch link     = 0x00007A10000004C2
  interrupt link  = 0x000006DE00007A4C
  time            = 201920
driver status:
  tx ring  0: qid=0  cur=20  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=23  queued=0  
  tx ring  4: qid=4  cur=111 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=29
wlan0: Ethernet address: 00:21:5c:50:68:c3
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000202030000
  branch link     = 0x00005CEE000004C2
  interrupt link  = 0x000006DE00007386
  time            = 270960
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=67  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=45
wlan0: Ethernet address: 00:21:5c:50:68:c3
wlan0: link state changed to UP
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207030000
  branch link     = 0x00003BBA000004C2
  interrupt link  = 0x000006DE00003C5A
  time            = 3270454051
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=78  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=23
wlan0: link state changed to DOWN
wlan0: Ethernet address: 00:21:5c:50:68:c3
wlan0: Ethernet address: 00:21:5c:50:68:c3
iwn0: iwn_intr: fatal firmware error
firmware error log:
  error type      = "NMI_INTERRUPT_WDG" (0x00000004)
  program counter = 0x0000046C
  source line     = 0x000000D0
  error data      = 0x0000000207030000
  branch link     = 0x00008370000004C2
  interrupt link  = 0x000006DE000018B8
  time            = 11589053
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=1   queued=0  
  tx ring  4: qid=4  cur=45  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=42
wlan0: Ethernet address: 00:21:5c:50:68:c3
wlan0: link state changed to UP
Comment 9 Anton Shterenlikht 2014-05-14 14:54:22 UTC
See also
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/189802


Seems iwn causes panic now.
Comment 10 Rene Ladan freebsd_committer 2014-08-10 12:45:25 UTC
I'm seeing the same (or quite similar) fatal firmware errors on my Acer 7738G with this chip:
iwn0: <Intel WiFi Link 5100> mem 0xf5200000-0xf5201fff irq 17 at device 0.0 on pci3

This is on 10.0-RELEASE amd64, with firmware version iwlwifi-5150-8.24.2.2
Comment 11 amvandemore 2015-08-11 00:17:05 UTC
Same issue here:

FreeBSD m6600.galacticdominator.com 10.2-PRERELEASE FreeBSD 10.2-PRERELEASE #5 r286157: Sat Aug  1 10:22:41 CDT 2015     adam@m6600.galacticdominator.com:/usr/obj/usr/src/sys/M6600  amd64

It has been occuring much more frequently after I upgraded to r286157.  Downing interfaces, powering off wireless, waiting 30 secs, upping interfaces seems a reliable way to recover.


Aug 10 19:04:33 m6600 kernel: iwn0: iwn_intr: fatal firmware error
Aug 10 19:04:33 m6600 kernel: firmware error log:
Aug 10 19:04:33 m6600 kernel: error type      = "NMI_INTERRUPT_WDG" (0x00000004)
Aug 10 19:04:33 m6600 kernel: program counter = 0x000006B4
Aug 10 19:04:33 m6600 kernel: source line     = 0x00007B20
Aug 10 19:04:33 m6600 kernel: error data      = 0x0000000202230000
Aug 10 19:04:33 m6600 kernel: branch link     = 0x0000067A0000071A
Aug 10 19:04:33 m6600 kernel: interrupt link  = 0x0000153200006874
Aug 10 19:04:33 m6600 kernel: time            = 1209333766
Aug 10 19:04:33 m6600 kernel: driver status:
Aug 10 19:04:33 m6600 kernel: tx ring  0: qid=0  cur=36  queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  1: qid=1  cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  2: qid=2  cur=107 queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  3: qid=3  cur=59  queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  4: qid=4  cur=134 queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  5: qid=5  cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  6: qid=6  cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  7: qid=7  cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  8: qid=8  cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring  9: qid=9  cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 10: qid=10 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 11: qid=11 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 12: qid=12 cur=101 queued=1  
Aug 10 19:04:33 m6600 kernel: tx ring 13: qid=13 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 14: qid=14 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 15: qid=15 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 16: qid=16 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 17: qid=17 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 18: qid=18 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: tx ring 19: qid=19 cur=0   queued=0  
Aug 10 19:04:33 m6600 kernel: rx ring: cur=8
Comment 12 Eitan Adler freebsd_committer freebsd_triage 2018-05-28 19:40:50 UTC
batch change:

For bugs that match the following
-  Status Is In progress 
AND
- Untouched since 2018-01-01.
AND
- Affects Base System OR Documentation

DO:

Reset to open status.


Note:
I did a quick pass but if you are getting this email it might be worthwhile to double check to see if this bug ought to be closed.