current panics with urtwn0

[Stefan Hertenberger <stefan@hertenberger.bayern>]

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Content preview:  hello, latest current panics when my usb wireless device is
   attached. i made a screenshot of the stack trace => https://www.alarum.de/netbsd/20170123_205754.jpg
   urtwn0 at uhub4 port 4 urtwn0: Realtek 802.11n WLAN Adapter, rev 2.00/2.00,
   addr 4 urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R, address 74:da:38:88:7c:ad
   urtwn0: 1 rx pipe, 2 tx pipes urtwn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
   urtwn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps
   36Mbps 48Mbps 54Mbps [...] 

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--- Begin Message ---

• To: current-users%netbsd.org@localhost
• Subject: current panics with urtwn0
• From: Stefan Hertenberger <stefan@hertenberger.bayern>
• Date: Mon, 23 Jan 2017 21:15:52 +0100

hello,

latest current panics when my usb wireless device is attached. i made
a screenshot of the stack trace =>
https://www.alarum.de/netbsd/20170123_205754.jpg

urtwn0 at uhub4 port 4
urtwn0: Realtek 802.11n WLAN Adapter, rev 2.00/2.00, addr 4
urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R, address 74:da:38:88:7c:ad
urtwn0: 1 rx pipe, 2 tx pipes
urtwn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
urtwn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps
24Mbps 36Mbps 48Mbps 54Mbps

--- End Message ---