mac80211: don't allow 40MHz tx rates in case of 20MHz chandef

When 20MHz chandef is used, 40MHz rates shouldn't be
used (by the rate-control algorithm), even if the sta
ht capabilities indicate support for it.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
index 671ce0d27a80..bc9e8fc48785 100644
--- a/net/mac80211/vht.c
+++ b/net/mac80211/vht.c
@@ -287,6 +287,8 @@ enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
                 /* fall through */
         case NL80211_CHAN_WIDTH_20_NOHT:
         case NL80211_CHAN_WIDTH_20:
+                bw = IEEE80211_STA_RX_BW_20;
+                break;
         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;