[Bug 213456] Problem with iwn firmware on 11-RELEASE

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213456

            Bug ID: 213456
           Summary: Problem with iwn firmware on 11-RELEASE
           Product: Base System
           Version: 11.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: wireless
          Assignee: freebsd-wireless at FreeBSD.org
          Reporter: kpect at protonmail.com
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

Hello.
After upgrading from 10.3 to 11.0 I've got new problems with my iwn driver on
Lenovo T430. Before 11 I didn't have such issues.
$ uname -a
FreeBSD KPECT 11.0-RELEASE-p1 FreeBSD 11.0-RELEASE-p1 #0: Tue Oct 11 20:41:43
MSK 2016     root at KPECT  amd64

wlan0: Ethernet address: a4:4e:31:2a:64:5c
iwn0: iwn_read_firmware: ucode rev=0x12a80601
wlan0: link state changed to UP
wlan0: link state changed to DOWN
iwn0: device timeout
iwn0: iwn_read_firmware: ucode rev=0x12a80601
iwn0: scan timeout
iwn0: iwn_read_firmware: ucode rev=0x12a80601
wlan0: link state changed to UP

Link goes up and down several times before actual authentication which is much
longer now. Once I even got following:

Oct 12 19:07:57 KPECT kernel: wlan0: Ethernet address: a4:4e:31:2a:64:5c
Oct 12 19:07:57 KPECT kernel: iwn0: iwn_read_firmware: ucode rev=0x12a80601
Oct 12 19:07:57 KPECT kernel: wlan0: link state changed to UP
Oct 12 19:07:57 KPECT kernel: iwn0: iwn_intr: fatal firmware error
Oct 12 19:07:57 KPECT kernel: firmware error log:
Oct 12 19:07:57 KPECT kernel: error type      = "UNKNOWN" (0x00000038)
Oct 12 19:07:57 KPECT kernel: program counter = 0x00009918
Oct 12 19:07:57 KPECT kernel: source line     = 0x000003C4
Oct 12 19:07:57 KPECT kernel: error data      = 0x0000000000000000
Oct 12 19:07:57 KPECT kernel: branch link     = 0x0000991400009914
Oct 12 19:07:57 KPECT kernel: interrupt link  = 0x0000D6BE00000000
Oct 12 19:07:57 KPECT kernel: time            = 7449
Oct 12 19:07:57 KPECT kernel: driver status:
Oct 12 19:07:57 KPECT kernel: tx ring  0: qid=0  cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  1: qid=1  cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  2: qid=2  cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  3: qid=3  cur=2   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  4: qid=4  cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  5: qid=5  cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  6: qid=6  cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  7: qid=7  cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  8: qid=8  cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring  9: qid=9  cur=83  queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 10: qid=10 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 11: qid=11 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 12: qid=12 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 13: qid=13 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 14: qid=14 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 15: qid=15 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 16: qid=16 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 17: qid=17 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 18: qid=18 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: tx ring 19: qid=19 cur=0   queued=0  
Oct 12 19:07:57 KPECT kernel: rx ring: cur=5
Oct 12 19:07:57 KPECT kernel: iwn0: iwn_panicked: controller panicked, iv_state
= 5; restarting
Oct 12 19:07:57 KPECT kernel: wlan0: link state changed to DOWN
Oct 12 19:07:57 KPECT kernel: iwn0: iwn_read_firmware: ucode rev=0x12a80601
Oct 12 19:07:57 KPECT kernel: wlan0: link state changed to UP
Oct 12 19:07:57 KPECT kernel: wlan0: link state changed to DOWN
Oct 12 19:07:57 KPECT kernel: iwn0: device timeout
Oct 12 19:07:57 KPECT kernel: iwn0: iwn_read_firmware: ucode rev=0x12a80601
Oct 12 19:07:57 KPECT kernel: iwn0: scan timeout
Oct 12 19:07:57 KPECT kernel: iwn0: iwn_read_firmware: ucode rev=0x12a80601
Oct 12 19:07:57 KPECT kernel: wlan0: link state changed to UP


Regards,
Sergey.

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