Hi,
> I have a question regarding the 11n 20MHz/40MHz channel width
> configuration:
>
> Since the 802.11n Draft 2.0 System Interoperability Test Plan v1.1
> requires the default configuration being set to 20MHz, is there any
> way to set the channel width to 40MHz at run-time?
In mac80211 have a module parameter "ieee80211_disable_40mhz_24ghz"
which, for backward compatibility reasons, actually defaults to false,
so you need to set it to true to get a compliant system. When a system
is integrated, this parameter can be set as default.
I don't think it really is necessary to set this at runtime.
I guess I see two options:
1) move the module parameter to cfg80211, and check the sdata HT config
in the driver again when this is needed
2) have your own module parameter like it
The first would be slightly more generic, but an OEM integrating a
device into their system and doing WFA testing will do device-specific
things anyway ...
johannes
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