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Re: [stable] [PATCH 1/4 2.6.33.y] mac80211: explicitly disable/enable QoS

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On Wed, Jul 28, 2010 at 12:15:25AM +0100, Ben Hutchings wrote:
> On Tue, 2010-07-27 at 15:40 -0700, Greg KH wrote:
> > On Mon, Jun 07, 2010 at 12:00:24PM +0200, Stanislaw Gruszka wrote:
> > > commit e1b3ec1a2a336c328c336cfa5485a5f0484cc90d upstream.
> > > 
> > > Add interface to disable/enable QoS (aka WMM or WME). Currently drivers
> > > enable it explicitly when ->conf_tx method is called, and newer disable.
> > > Disabling is needed for some APs, which do not support QoS, such
> > > we should send QoS frames to them.
> > 
> > Why is this a patch for a -stable tree?  It looks like it adds a new api
> > for a new feature, right?
> [...]
> 
> It extends the interface between the 802.11 stack and drivers so that
> drivers can avoid sending QoS frames to APs that don't support them.
> There is no new interface to userland.  My understanding is that iwlwifi
> becomes unable to communicate with non-QoS-capable APs after having once
> associated with a QoS-capable AP, without this and the following change
> in iwlwifi itself.

Is this really true?  And is it a bug that people are hitting?

thanks,

greg k-h
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