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Re: regulatory: Operation already in progress

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On Sun, Jan 25, 2009 at 10:45:17AM -0800, Luis Rodriguez wrote:
> On Sun, Jan 25, 2009 at 10:41:38AM -0800, Michael Buesch wrote:
> > On Sunday 25 January 2009 19:21:07 Luis R. Rodriguez wrote:
> > > On Sun, Jan 25, 2009 at 05:22:42AM -0800, Michael Buesch wrote:
> > > > mb@quimby:~/kernel$ sudo iw reg set DE
> > > > command failed: Operation already in progress (-114)
> > > >
> > > > I wonder why this happens.
> > > > What I just did was install 2.6.28.2 and install today's compat-wireless.
> > > >
> > > > In dmesg I can see it succeeded once but it doesn't work anymore now.
> > > > [  973.992710] cfg80211: Calling CRDA for country: DE
> > > > [  973.998576] cfg80211: Regulatory domain changed to country: DE
> > > > [  973.998630]  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
> > > > [  973.998691]  (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm)
> > > > [  973.998738]  (5150000 KHz - 5255000 KHz @ 40000 KHz), (N/A, 2301 mBm)
> > > > [  973.998785]  (5470000 KHz - 5650000 KHz @ 40000 KHz), (N/A, 3000 mBm)
> > >
> > > Had you called twice?
> >
> > yeah, once manually with iw and once with hostapd.
> >
> > > If so we now tell userspace when its there by -EALREADY,
> > > we were just silently accepting two consecutive calls before.
> >
> > Well, but it makes hostapd fail.
> > I think it's a bit weird to throw and error code. In general most programs
> > silently return success early, if an operation was already done.
> 
> We can prevent to propagate -EALREADY to userspace -- sure, I'll cook
> up the patch.

Actually we could also patch hostapd to deal with -EALREADY as a success too.
Its either that or we have nl80211 return 0 instead of -EALREADY. Jouni, any
preference?

  Luis
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