mac80211: use RCU for TX aggregation

Currently we allocate some memory for each TX
aggregation session and additionally keep a
state bitmap indicating the state it is in.
By using RCU to protect the pointer, moving
the state into the structure and some locking
trickery we can avoid locking when the TX agg
session is fully operational.

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

1 files changed, 4 insertions, 4 deletions

diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 95c1ea47ad35..8a74ffb36ad4 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -134,15 +134,15 @@ static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
                                 sta->ampdu_mlme.tid_rx[i]->ssn : 0);
 
                 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
-                                sta->ampdu_mlme.tid_state_tx[i]);
+                                !!sta->ampdu_mlme.tid_tx[i]);
                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
-                                sta->ampdu_mlme.tid_state_tx[i] ?
+                                sta->ampdu_mlme.tid_tx[i] ?
                                 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
-                                sta->ampdu_mlme.tid_state_tx[i] ?
+                                sta->ampdu_mlme.tid_tx[i] ?
                                 sta->ampdu_mlme.tid_tx[i]->ssn : 0);
                 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
-                                sta->ampdu_mlme.tid_state_tx[i] ?
+                                sta->ampdu_mlme.tid_tx[i] ?
                                 skb_queue_len(&sta->ampdu_mlme.tid_tx[i]->pending) : 0);
                 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
         }