problem with downing wlan's

James Harper james.harper
Mon Jan 12 01:34:21 PST 2004

I've been trying to solve my smp problems, and making little changes to
the code. About 50% of the time the first rmmod and subsequent modprobe
will hang the machine. If the first one doesn't, subsequent cycles seem
to work okay. Because I'm lazy and am doing via my laptop, I never
actually see what's on the screen, but assume it's an oops.


> -----Original Message-----
> From: at
> at] On Behalf Of Vaclav Dvorak
> Sent: Friday, 2 January 2004 11:23
> To: hostap at
> Subject: problem with downing wlan's
> Hello,
> I am having problems with prism54 driver for an SMC2802W 802.11g card
> a computer that also has two ZCom XI-626 802.11b cards controlled by
> hostap, one of them in master mode. The problem may be completely
> unrelated to hostap (although I'd love to hear if there are any known
> problems with hostap when combined with prism54). However, during
> debugging, I stumbled upon a different problem:
> I wanted to try rmmod-ing hostap_pci to see whether it helps, and it
> doesn't seem to work. I did "ifconfig wlan0 down; ifconfig wlan1 down;
> rmmod hostap_pci", and it hung the machine. So the next time the
> booted, I tried the commands one by one. The ifconfig's succeeded, but
> the rmmod never finished, although this time it didn't hang. Instead,
> the log said: "kernel: unregister_netdevice: waiting for wlan1 to
> free. Usage count = 2", and the message repeated approximately once
> every 10 seconds.
> Hostap is 0.1.2.
> --
> Vaclav Dvorak  <vdvo at>
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