On Thu, Jul 12, 2007 at 12:17:35AM +0100, seventh guardian wrote:
> Hello,
> First of all I'm fairly new to this list (in all, this is my first
> message), so please be gentle.. I promise I will try not to waste your
> precious time.
>
> >I believe we have a deadlock in d80211.
>
> I have it too. But I'm using iwl3945 driver, in-kernel mac80211, and a
> gentoo kernel (basically a patched vanilla-2.6.22.1). My machine is a
> x86_64 core 2 duo.
>
> >The following triggers it on my 2way SMT machine with preempt.
> >
> >modprobe bcm43xx-d80211
> >add sta0
> >ifconfig sta0 up
> >start wpa_supplicant on the interface
> >rmmod bcm43xx-d80211
> >
> >After that rmmod hangs spinning and wpa_supplicant
> >stays in D state.
> >
> >If I first kill wpa_supplicant and then rmmod the module,
> >it does not deadlock.
>
> I can trigger this way:
>
> modprobe iwl3945
> ifconfig wlan0 up
> start wpa_supplicant
> do some wpa_supplicant work (for instance issue a scan)
> stop wpa_supplicant
>
> Then it will deadlock (that is, wpa_supplicant will refuse to be
> killed). The same thing happens if I try to modprobe the module out
> (modprobe will "hang spinning" as you said). I have to ultimately
> hard-shutdown my machine to bring it back to normal.
It seems you are replying to a very old original message. Since that
message was sent, linux-wireless@xxxxxxxxxxxxxxx has become the
primary forum for wireless discussion.
Any chance you are savvy enough with git to try the wireless-dev kernel?
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-dev.git
Can you replicate the problem using those sources? If so, you may
want to attach your .config in your reply (just in case the exact
config makes a difference).
Thanks,
John
--
John W. Linville
linville@xxxxxxxxxxxxx
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