rsu0: could not send site survey command 0

[Thomas Mueller]

What is the meaning of this message?  I find my wireless connection has gone down and get that message on ttyv1, making that console unusable, at least temporarily.

I logged in on another root console and typed 
ifconfig wlan0 down
and that seems to have stopped the ill message.

Not good enough, I had to type 
ifconfig wlan0 destroy
before starting up again, which I was able to do; svn update of ports appeared successful.

But I am still curious about the meaning of that message.

WLAN device is Hiro H50191 USB wireless adapter, chipset RTL8191SU.

Tom