From: Johannes Berg <[email protected]> If a peer or some local agent (rate control, ...) decides to start an aggregation session but doesn't support HT (which also implies QoS), reject it.
This is mostly a corner case as such peers normally won't try to use block-ack sessions and rate control wouldn't start them, but technically QoS stations could request it according to the spec. However, since drivers don't really support such non-HT sessions it's better to reject them. Also, while at it, move the tracing for TX sessions earlier so it captures the error cases as well. Reviewed-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]> --- net/mac80211/agg-rx.c | 8 ++++++++ net/mac80211/agg-tx.c | 5 ++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index a48bad468880..2c090c507391 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -234,6 +234,14 @@ void __ieee80211_start_rx_ba_session(struct sta_info *sta, int i, ret = -EOPNOTSUPP; u16 status = WLAN_STATUS_REQUEST_DECLINED; + if (!sta->sta.ht_cap.ht_supported) { + ht_dbg(sta->sdata, + "STA %pM erroneously requests BA session on tid %d w/o QoS\n", + sta->sta.addr, tid); + /* send a response anyway, it's an error case if we get here */ + goto end_no_lock; + } + if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { ht_dbg(sta->sdata, "Suspend in progress - Denying ADDBA request (%pM tid %d)\n", diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index 668524aeb0b2..20522492d8cc 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -509,11 +509,14 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, struct tid_ampdu_tx *tid_tx; int ret = 0; + trace_api_start_tx_ba_session(pubsta, tid); + if (WARN(sta->reserved_tid == tid, "Requested to start BA session on reserved tid=%d", tid)) return -EINVAL; - trace_api_start_tx_ba_session(pubsta, tid); + if (!pubsta->ht_cap.ht_supported) + return -EINVAL; if (WARN_ON_ONCE(!local->ops->ampdu_action)) return -EINVAL; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
