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Re: [PATCH 2/2] mac80211: don't transmit 40MHz frames to 20MHz peer

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On Thu, 2012-04-26 at 15:01 -0700, Thomas Pedersen wrote:
> If a mesh peer indicates it is operating as 20MHz-only in its HT
> operation IE, have the rate control algorithm respect this by disabling
> the equivalent bit in the ieee80211_sta HT capabilities.
> 
> Signed-off-by: Thomas Pedersen <thomas@xxxxxxxxxxx>
> ---
>  net/mac80211/mesh_plink.c |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
> index f4124d7..6209327 100644
> --- a/net/mac80211/mesh_plink.c
> +++ b/net/mac80211/mesh_plink.c
> @@ -302,6 +302,12 @@ static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata,
>  	else
>  		memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap));
>  
> +	if (elems->ht_operation)
> +		if (!(elems->ht_operation->ht_param &
> +		      IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
> +			sta->sta.ht_cap.cap &=
> +					    ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;

The double if is a bit odd, why not use && to clean up all the
formatting?

johannes

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