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mac80211: Fix station bandwidth setting after channel switch
When performing a channel switch flow for a managed interface, the flow did not update the bandwidth of the AP station and the rate scale algorithm. In case of a channel width downgrade, this would result with the rate scale algorithm using a bandwidth that does not match the interface channel configuration. Fix this by updating the AP station bandwidth and rate scaling algorithm before the actual channel change in case of a bandwidth downgrade, or after the actual channel change in case of a bandwidth upgrade. Signed-off-by: Ilan Peer <ilan.peer@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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1 changed files with 53 additions and 0 deletions
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@ -978,6 +978,10 @@ static void ieee80211_chswitch_work(struct work_struct *work)
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*/
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if (sdata->reserved_chanctx) {
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struct ieee80211_supported_band *sband = NULL;
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struct sta_info *mgd_sta = NULL;
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enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
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/*
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* with multi-vif csa driver may call ieee80211_csa_finish()
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* many times while waiting for other interfaces to use their
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@ -986,6 +990,48 @@ static void ieee80211_chswitch_work(struct work_struct *work)
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if (sdata->reserved_ready)
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goto out;
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if (sdata->vif.bss_conf.chandef.width !=
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sdata->csa_chandef.width) {
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/*
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* For managed interface, we need to also update the AP
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* station bandwidth and align the rate scale algorithm
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* on the bandwidth change. Here we only consider the
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* bandwidth of the new channel definition (as channel
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* switch flow does not have the full HT/VHT/HE
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* information), assuming that if additional changes are
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* required they would be done as part of the processing
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* of the next beacon from the AP.
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*/
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switch (sdata->csa_chandef.width) {
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case NL80211_CHAN_WIDTH_20_NOHT:
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case NL80211_CHAN_WIDTH_20:
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default:
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bw = IEEE80211_STA_RX_BW_20;
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break;
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case NL80211_CHAN_WIDTH_40:
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bw = IEEE80211_STA_RX_BW_40;
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break;
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case NL80211_CHAN_WIDTH_80:
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bw = IEEE80211_STA_RX_BW_80;
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break;
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case NL80211_CHAN_WIDTH_80P80:
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case NL80211_CHAN_WIDTH_160:
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bw = IEEE80211_STA_RX_BW_160;
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break;
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}
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mgd_sta = sta_info_get(sdata, ifmgd->bssid);
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sband =
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local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
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}
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if (sdata->vif.bss_conf.chandef.width >
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sdata->csa_chandef.width) {
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mgd_sta->sta.bandwidth = bw;
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rate_control_rate_update(local, sband, mgd_sta,
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IEEE80211_RC_BW_CHANGED);
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}
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ret = ieee80211_vif_use_reserved_context(sdata);
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if (ret) {
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sdata_info(sdata,
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@ -996,6 +1042,13 @@ static void ieee80211_chswitch_work(struct work_struct *work)
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goto out;
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}
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if (sdata->vif.bss_conf.chandef.width <
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sdata->csa_chandef.width) {
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mgd_sta->sta.bandwidth = bw;
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rate_control_rate_update(local, sband, mgd_sta,
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IEEE80211_RC_BW_CHANGED);
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}
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goto out;
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}
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