Re: [PATCH 6/7] wifi: cfg80211: Add support for interface usage notification

[Kalle Valo <kvalo@kernel.org>]

Miri Korenblit <miriam.rachel.korenblit@intel.com> writes:

> From: Ilan Peer <ilan.peer@intel.com>
>
> In some cases, when an interface is added by user space, user space
> might not know yet what is the intended type of the interface, e.g.,
> before a P2P Group Ownership Negotiation (GON) an interface is added
> but only at the end of the GON flow the final interface type is
> determined. This doesn't allow the kernel drivers to prepare for the
> actual interface type, e.g., make resources available for the
> interface type etc.
>
> Generally, adding an interface doesn't necessarily imply that it will
> actually be used soon, and as described the interface might not be used
> with the type it's added as.
>
> This new API allows user space to indicate that it does indeed intend to
> use the interface soon, along with the types (of which the interface
> must be one) that may be selected for that usage. This will allow the
> underlying driver to adjust resources accordingly.
>
> Signed-off-by: Ilan Peer <ilan.peer@intel.com>
> Reviewed-by: Johannes Berg <johannes.berg@intel.com>
> Tested-by: iil_jenkins iil_jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>

This new command just looks weird to me, do we really need it? I would
expect to see a workaround like this in out-of-tree drivers but not in
upstream.

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