mac80211: use maximum number of AMPDU frames as default in BA RX

commit 82694f764dad783a123394e2220b92b9be721b43 upstream.

When the buffer size is set to zero in the block ack parameter set
field, we should use the maximum supported number of subframes.  The
existing code was bogus and was doing some unnecessary calculations
that lead to wrong values.

Thanks Johannes for helping me figure this one out.

Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Luciano Coelho <coelho@ti.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index 965b272499fd7616e4df039e3c878dda678f5cf9..2f6903e48dd9c76d916a6398f749fa036a592464 100644 (file)
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -172,8 +172,6 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
                                     struct ieee80211_mgmt *mgmt,
                                     size_t len)
 {
-       struct ieee80211_hw *hw = &local->hw;
-       struct ieee80211_conf *conf = &hw->conf;
        struct tid_ampdu_rx *tid_agg_rx;
        u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
        u8 dialog_token;
@@ -218,13 +216,8 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
                goto end_no_lock;
        }
        /* determine default buffer size */
-       if (buf_size == 0) {
-               struct ieee80211_supported_band *sband;
-
-               sband = local->hw.wiphy->bands[conf->channel->band];
-               buf_size = IEEE80211_MIN_AMPDU_BUF;
-               buf_size = buf_size << sband->ht_cap.ampdu_factor;
-       }
+       if (buf_size == 0)
+               buf_size = IEEE80211_MAX_AMPDU_BUF;
 
 
        /* examine state machine */