diff options
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 1 | ||||
| -rw-r--r-- | net/mac80211/mlme.c | 16 |
2 files changed, 17 insertions, 0 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 5e636bc3551f..21186e280ceb 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -671,6 +671,7 @@ enum queue_stop_reason { IEEE80211_QUEUE_STOP_REASON_AGGREGATION, IEEE80211_QUEUE_STOP_REASON_SUSPEND, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, + IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE, }; #ifdef CONFIG_MAC80211_LEDS diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index fb2f0f986de7..ca97b80b2651 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1918,8 +1918,24 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, rcu_read_unlock(); + /* + * Whenever the AP announces the HT mode change that can be + * 40MHz intolerant or etc., it would be safer to stop tx + * queues before doing hw config to avoid buffer overflow. + */ + ieee80211_stop_queues_by_reason(&sdata->local->hw, + IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE); + + /* flush out all packets */ + synchronize_net(); + + drv_flush(local, false); + changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, bssid, ap_ht_cap_flags); + + ieee80211_wake_queues_by_reason(&sdata->local->hw, + IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE); } /* Note: country IE parsing is done for us by cfg80211 */ |