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From: "Luis R. Rodriguez" <mcgrof@gmail.com>
Date: Wed, 26 Aug 2009 13:33:36 -0700
Message-ID: <43e72e890908261333m1d576fdhaa16088affec5426@mail.gmail.com>
Subject: Re: [RFC/RFT] rtl8187: Implement rfkill support
To: Johannes Berg <johannes@sipsolutions.net>
Cc: htl10@users.sourceforge.net,
	Hin-Tak Leung <hintak.leung@gmail.com>,
	Larry Finger <Larry.Finger@lwfinger.net>,
	Herton Ronaldo Krzesinski <herton@mandriva.com.br>,
	linux-wireless@vger.kernel.org
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Sender: linux-wireless-owner@vger.kernel.org

On Wed, Aug 26, 2009 at 7:34 AM, Johannes Berg<johannes@sipsolutions.net> wrote:
> On Wed, 2009-08-26 at 13:33 +0000, Hin-Tak Leung wrote:
>
>> > Or wait ... are you using compat-wireless?
>>
>> Yes, I am. I mentioned this and did wonder if the _backport/ part
>> in /sys/class is important.
>
> Sorry, didn't see.
>
> Anyway, that's pretty clearly the reason -- Luis added NETDEV_PRE_UP to
> some compat*.h but obviously the kernel won't ever call that notifier,
> so cfg80211 doesn't get a chance to reject the IFUP. No idea how to
> handle that -- it'll be working fine in a regular tree.
>
> Luis, the only way to handle that would be to manually call the PRE_UP
> notifier from mac80211's subif_open() and if that returns an error
> (warning: the calling convention is weird) return the error... that's
> weird but would work.

Neat, thanks. Not sure if I'll get to this this anytime soon, but if
someone is interested in it please give it a shot and send a patch.
That would be nice.

  Luis