Re: [PATCH 3/7] iwlwifi: fix priv->iw_mode setting when multiple vif are configured

[Zhu Yi <yi.zhu@intel.com>]

On Thu, Oct 30, 2008 at 05:18:03PM +0800, Johannes Berg wrote:
> Reinette Chatre wrote:
> > From: Zhu, Yi <yi.zhu@intel.com>
> >
> > mac80211 supports multiple virtual interfaces for a single device. For
> > example, a managed interface (wlan0) and a monitor interface (mon0) can
> > exist at the same time. Thus priv->iw_mode is not sufficient to track
> > the wireless mode any more.
> 
> This example is not correct, mac80211 will only support multiple virtual
> interfaces when the driver allows this via add_interface (which I don't
> think yours does) and it will *never* tell you about monitor interfaces at
> all except by way of configuring the filter differently.

We do support add_interface in iwlagn. But it works correctly only if
the second one is a monitor interface.

> Therefore, all the "is monitor" checks in iwlwifi are pretty pointless
> unless you really want to have differing behaviour between "monitor +
> something" and "just monitor"?

In case of BSS + monitor, we need to tell firmware about the
association status. This differs with pure montior mode.

Thanks,
-yi