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Re: [PATCH V2] mac80211: Implementation of SIOCSIWRATE

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On Thursday 07 June 2007 17:43, Larry Finger wrote:
> +	sdata->u.sta.supp_rates_bits = supp;
Can't do this unless you verify sdata->type is IEEE80211_IF_TYPE_STA or 
IEEE80211_IF_TYPE_IBSS.

Also, what rate(s) we choose to TX at doesn't have much to do with what rates 
we actually support. I don't think this should be set.

> +	if (sdata->type == IEEE80211_IF_TYPE_STA) {
> +		sta = sta_info_get(local, sdata->u.sta.bssid);
> +		if (sta) {
> +			sta->txrate = sdata->u.ap.max_ratectrl_rateidx;
This is automatically set as soon as the next frame is TXed, as said before in 
the previous review.

> +			sta->supp_rates = supp;
This is definitely wrong. What rates we support has nothing to do with what 
rates the AP supports.

One last thing - max_ratectrl_rateidx should be set to -1 to indicate no 
maximum. Not doing this will cause problems when switching from one hw mode 
to another with a different number of rates.

-Michael Wu

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