mac80211: allow advertising correct maximum aggregate size

Currently, mac80211 always advertises that it may send
up to 64 subframes in an aggregate. This is fine, since
it's the max, but might as well be set to zero instead
since it doesn't have any information.

However, drivers might have that information, so allow
them to set a variable giving it, which will then be
used. The default of zero will be fine since to the
peer that means we don't know and it will just use its
own limit for the buffer size.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index 42f7c9007331..63d852cb4ca2 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -342,7 +342,8 @@ void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
         /* send AddBA request */
         ieee80211_send_addba_request(sdata, sta->sta.addr, tid,
                                      tid_tx->dialog_token, start_seq_num,
-                                     0x40, tid_tx->timeout);
+                                     local->hw.max_tx_aggregation_subframes,
+                                     tid_tx->timeout);
 }
 
 int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,