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Re: [PATCH 0/4] multi-channel/interface TX power handling

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On Wed, 2012-10-24 at 09:31 -0700, Ben Greear wrote:

> > Yeah that'd be the only way, most scripts I've seen always just use the
> > interface anyway though? I'm not totally happy about this, maybe we
> > should iterate all interfaces? Not really sure ...
> 
> Well, I think we should make setting the wiphy work...just iterate
> all interfaces.  Breaking backwards compatibility just causes too
> much problems for user-space, and many users may either not notice,
> or not be able to change whatever software is screwing up.

Yeah I guess.

> But, I think we also need some way to know if we can set individual
> vifs to different tx-power successfully.
> 
> Maybe a /sys/class/netdev/wlan0/tx-power file to read current power could
> be added in this patch series?  Then user-space could key off of it's
> existence, and it would give a simple way to read the current tx-power
> settings (and possibly set it as well)...

sysfs file sounds like about the worst possible way (except maybe for
procfs), an nl80211 feature flag could be worthwhile though :)

johannes

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