Bizarre iwn(4) firmware crash

[R. Tyler Croy]

I'm not sure if this is a bug to file against intel, or a bug for us to worry
about. The firmware crashed, taking me offline. Fortunately `service netif
restart` brought wireless back for a short time before I saw this in /var/log/messages:

Dec 10 10:47:05 kiwi kernel: iwn0: device timeout
Dec 10 10:48:35 kiwi kernel: iwn0: device timeout


The firmware crash itself:

Dec 10 09:58:24 kiwi kernel: iwn0: RF switch: radio enabled
Dec 10 09:58:25 kiwi kernel: iwn0: RF switch: radio disabled
Dec 10 09:58:25 kiwi kernel: iwn0: RF switch: radio enabled
Dec 10 09:58:25 kiwi kernel: iwn0: RF switch: radio disabled
Dec 10 09:58:25 kiwi kernel: iwn0: iwn_intr: fatal firmware error
Dec 10 09:58:25 kiwi kernel: firmware error log:
Dec 10 09:58:25 kiwi kernel: error type      = "SYSASSERT" (0x00000005)
Dec 10 09:58:25 kiwi kernel: program counter = 0x0001BE44
Dec 10 09:58:25 kiwi kernel: source line     = 0x000000FB
Dec 10 09:58:25 kiwi kernel: error data      = 0x0000000000000000
Dec 10 09:58:25 kiwi kernel: branch link     = 0x0001BD540001BD54
Dec 10 09:58:25 kiwi kernel: interrupt link  = 0x0000091600000000
Dec 10 09:58:25 kiwi kernel: time            = 237232
Dec 10 09:58:25 kiwi kernel: driver status:
Dec 10 09:58:25 kiwi kernel: tx ring  0: qid=0  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  1: qid=1  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  2: qid=2  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  3: qid=3  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  4: qid=4  cur=16  queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  5: qid=5  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  6: qid=6  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  7: qid=7  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  8: qid=8  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring  9: qid=9  cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring 10: qid=10 cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring 11: qid=11 cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring 12: qid=12 cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring 13: qid=13 cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring 14: qid=14 cur=0   queued=0  
Dec 10 09:58:25 kiwi kernel: tx ring 15: qid=15 cur=0   queued=0  


- R. Tyler Croy
------------------
   Code: https://github.com/rtyler
Chatter: https://twitter.com/agentdero
         rtyler at jabber.org

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