Subject: Re: [PATCH 3.5] cfg80211: enforce lack of interface combinations
From: Johannes Berg <johannes@sipsolutions.net>
To: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Cc: linux-wireless@vger.kernel.org,
	"Luis R. Rodriguez" <rodrigue@qca.qualcomm.com>,
	Jouni Malinen <jouni@qca.qualcomm.com>,
	Senthil Balasubramanian <senthilb@qca.qualcomm.com>,
	Kalle Valo <kvalo@qca.qualcomm.com>,
	Jiri Slaby <jirislaby@gmail.com>,
	Nick Kossifidis <mickflemm@gmail.com>,
	Bob Copeland <me@bobcopeland.com>,
	Bing Zhao <bzhao@marvell.com>,
	Lennert Buytenhek <buytenh@wantstofly.org>,
	Ivo van Doorn <IvDoorn@gmail.com>,
	Gertjan van Wingerde <gwingerde@gmail.com>,
	Helmut Schaa <helmut.schaa@googlemail.com>,
	Luciano Coelho <coelho@ti.com>
In-Reply-To: <20120315084217.GA17590@vasanth-laptop>
References: <20120313150613.300612962@sipsolutions.net>
	 <20120315084217.GA17590@vasanth-laptop>
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Date: Thu, 15 Mar 2012 09:51:28 +0100
Message-ID: <1331801488.3432.2.camel@jlt3.sipsolutions.net> (sfid-20120315_095139_640701_95F0BB7A)
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Sender: linux-wireless-owner@vger.kernel.org

On Thu, 2012-03-15 at 14:12 +0530, Vasanthakumar Thiagarajan wrote:
> On Tue, Mar 13, 2012 at 04:06:03PM +0100, Johannes Berg wrote:
> > From: Johannes Berg <johannes.berg@intel.com>
> > 
> > My grand plan to allow drivers to gradually move over
> > to advertising virtual interface combinations and only
> > enforce with drivers that do want it enforced doesn't
> > seem to be working out, only Christian ever added the
> > advertising (to carl9170), nobody else did.
> > 
> > Begin enforcing combinations in cfg80211 so that users
> > can rely on the information reported about a device.
> 
> This breaks ath6kl AP mode and P2P, is it expected that the driver
> needs to register the combination (?) even it supports a single
> interface?

Kalle tells me that ath6kl does support multiple virtual interfaces, but
if it didn't then it wouldn't have to register combinations.

I suspect you're using
driver_param=use_p2p_group_interface=1
in wpa_supplicant?

johannes