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Re: [RFC 4/6] mac80211: Allow disabling SGI-20.

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On Wed, 2012-12-12 at 13:54 -0800, greearb@xxxxxxxxxxxxxxx wrote:
> From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
> 
> This allows user-space (wpa_supplicant) to disable
> short guard interval (SGI) for 20Mhz.  The SGI-40
> disable option is already handled.
> 
> Signed-off-by: Ben Greear <greearb@xxxxxxxxxxxxxxx>
> ---
>  net/mac80211/ht.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
> index a71d891..8a6d68f 100644
> --- a/net/mac80211/ht.c
> +++ b/net/mac80211/ht.c
> @@ -62,6 +62,9 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
>  	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SUP_WIDTH_20_40);
>  	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_40);
>  
> +	/* Allow user to disable SGI-20 (SGI-40 is handled above) */
> +	__check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_20);

And you tested this? And it actually did something, despite
mac80211_ht_capa_mod_mask not including it??

johannes

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