P2P Device support: how to deal with p2p_no_group_iface option

[Johannes Berg]

On Mon, 2013-05-27 at 21:11 +0300, Jouni Malinen wrote:
> On Mon, May 27, 2013 at 03:56:19PM +0200, Arend van Spriel wrote:
> > In this mac80211_hwsim is a special case. We could make P2P_DEVICE
> > support in mac80211_hwsim optional using module parameter to allow
> > testing both cases.
> 
> Yes, that would be helpful. I don't understand why my test setup moves
> to using P2P Device by default when mac80211_hwsim is perfectly capable
> of operating without that.. [...]
> 
> In general, I don't think it is a good idea to change existing behavior
> with a kernel or wpa_supplicant upgrade. It is obviously fine if this is
> needed for the functionality to work in the first place, but that is not
> the case with mac80211_hwsim.

It's kinda a side effect of having "I support P2P-Device" also mean "I
want P2P-Device to be used", but for everything other than hwsim that
seems like the only reasonable choice, so ... I wouldn't mind changing
the default in hwsim though to not support/desire P2P-Device w/o a
configuration option or so.

johannes