Re: [PATCH v7 1/3] cfg80211: Add nl80211 antenna configuration

[Johannes Berg <johannes@sipsolutions.net>]

On Wed, 2010-11-10 at 12:50 +0900, Bruno Randolf wrote:

> 802.11n devices should enable or disable chains, based on which antennas are
> present (If all antennas belonging to a particular chain are disabled, the
> entire chain should be disabled). HT capabilities (like STBC, TX Beamforming,
> Antenna selection) should be calculated based on the available chains after
> applying the antenna masks. Should a 802.11n device have diversity antennas
> attached to one of their chains, diversity can be enabled or disabled based on
> the antenna information.

I'm not entirely convinced that this is a good idea. Nor that, even if
11n devices were to implement it, they should all implementing their own
code to update the HT capabilities. However, I suppose that nothing
forces them to implement it, and when somebody does I can still complain
when they put everything into the driver.

johannes