mac80211: update sta bw on ht chanwidth action frame

Commit e1a0c6b ("mac80211: stop toggling IEEE80211_HT_CAP_SUP_WIDTH_20_40")
mistakenly removed the actual update of sta->sta.bandwidth.

Refactor ieee80211_sta_cur_vht_bw() into multiple functions
(calculate caps-bw and chandef-bw separately, and min them
with cur_max_bandwidth).

On ht chanwidth action frame set only cur_max_bandwidth
(according to the sta capabilities) and recalc the sta bw.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index cc6e964..4f45cab 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1704,6 +1704,7 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
                                    struct ieee80211_supported_band *sband,
                                    const struct ieee80211_vht_cap *vht_cap_ie,
                                    struct sta_info *sta);
+enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 49c23bd..444ebff 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2597,7 +2597,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
                case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
                        struct ieee80211_supported_band *sband;
                        u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
-                       enum ieee80211_sta_rx_bandwidth new_bw;
+                       enum ieee80211_sta_rx_bandwidth max_bw, new_bw;
 
                        /* If it doesn't support 40 MHz it can't change ... */
                        if (!(rx->sta->sta.ht_cap.cap &
@@ -2605,13 +2605,18 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
                                goto handled;
 
                        if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ)
-                               new_bw = IEEE80211_STA_RX_BW_20;
+                               max_bw = IEEE80211_STA_RX_BW_20;
                        else
-                               new_bw = ieee80211_sta_cur_vht_bw(rx->sta);
+                               max_bw = ieee80211_sta_cap_rx_bw(rx->sta);
+
+                       /* set cur_max_bandwidth and recalc sta bw */
+                       rx->sta->cur_max_bandwidth = max_bw;
+                       new_bw = ieee80211_sta_cur_vht_bw(rx->sta);
 
                        if (rx->sta->sta.bandwidth == new_bw)
                                goto handled;
 
+                       rx->sta->sta.bandwidth = new_bw;
                        sband = rx->local->hw.wiphy->bands[status->band];
 
                        rate_control_rate_update(local, sband, rx->sta,

diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
index bc9e8fc..85f9596 100644 (file)
--- a/net/mac80211/vht.c
+++ b/net/mac80211/vht.c
@@ -269,51 +269,54 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
        sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
 }
 
-enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
+enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta)
 {
-       struct ieee80211_sub_if_data *sdata = sta->sdata;
-       u32 cap = sta->sta.vht_cap.cap;
-       enum ieee80211_sta_rx_bandwidth bw;
+       struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
+       u32 cap_width;
 
-       if (!sta->sta.vht_cap.vht_supported) {
-               bw = sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
-                               IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
-               goto check_max;
-       }
+       if (!vht_cap->vht_supported)
+               return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+                               IEEE80211_STA_RX_BW_40 :
+                               IEEE80211_STA_RX_BW_20;
 
-       switch (sdata->vif.bss_conf.chandef.width) {
-       default:
-               WARN_ON_ONCE(1);
-               /* fall through */
+       cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
+
+       if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
+           cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
+               return IEEE80211_STA_RX_BW_160;
+
+       return IEEE80211_STA_RX_BW_80;
+}
+
+static enum ieee80211_sta_rx_bandwidth
+ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
+{
+       switch (width) {
        case NL80211_CHAN_WIDTH_20_NOHT:
        case NL80211_CHAN_WIDTH_20:
-               bw = IEEE80211_STA_RX_BW_20;
-               break;
+               return IEEE80211_STA_RX_BW_20;
        case NL80211_CHAN_WIDTH_40:
-               bw = sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
-                               IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
-               break;
+               return IEEE80211_STA_RX_BW_40;
+       case NL80211_CHAN_WIDTH_80:
+               return IEEE80211_STA_RX_BW_80;
        case NL80211_CHAN_WIDTH_160:
-               if ((cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) ==
-                               IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) {
-                       bw = IEEE80211_STA_RX_BW_160;
-                       break;
-               }
-               /* fall through */
        case NL80211_CHAN_WIDTH_80P80:
-               if ((cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) ==
-                               IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) {
-                       bw = IEEE80211_STA_RX_BW_160;
-                       break;
-               }
-               /* fall through */
-       case NL80211_CHAN_WIDTH_80:
-               bw = IEEE80211_STA_RX_BW_80;
+               return IEEE80211_STA_RX_BW_160;
+       default:
+               WARN_ON_ONCE(1);
+               return IEEE80211_STA_RX_BW_20;
        }
+}
+
+enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
+{
+       struct ieee80211_sub_if_data *sdata = sta->sdata;
+       enum ieee80211_sta_rx_bandwidth bw;
+
+       bw = ieee80211_chan_width_to_rx_bw(sdata->vif.bss_conf.chandef.width);
+       bw = min(bw, ieee80211_sta_cap_rx_bw(sta));
+       bw = min(bw, sta->cur_max_bandwidth);
 
- check_max:
-       if (bw > sta->cur_max_bandwidth)
-               bw = sta->cur_max_bandwidth;
        return bw;
 }