mac80211: A-MPDU MLME use dynamic allocation

This patch alters the A-MPDU MLME in sta_info to use dynamic allocation,
thus drastically improving memory usage - from a constant ~2 Kbyte in
the previous (static) allocation to a lower limit of ~200 Byte and an upper
limit of ~2 Kbyte.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 10 insertions, 7 deletions

diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 62354de0199f..256ea880d28b 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -169,27 +169,30 @@ static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
         p += scnprintf(p, sizeof(buf)+buf-p, "\n RX  :");
         for (i = 0; i < STA_TID_NUM; i++)
                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
-        sta->ampdu_mlme.tid_rx[i].state);
+                        sta->ampdu_mlme.tid_state_rx[i]);
 
         p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
         for (i = 0; i < STA_TID_NUM; i++)
                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
-                        sta->ampdu_mlme.tid_rx[i].dialog_token);
+                        sta->ampdu_mlme.tid_state_rx[i]?
+                        sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
 
         p += scnprintf(p, sizeof(buf)+buf-p, "\n TX  :");
         for (i = 0; i < STA_TID_NUM; i++)
                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
-                        sta->ampdu_mlme.tid_tx[i].state);
+                        sta->ampdu_mlme.tid_state_tx[i]);
 
         p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
         for (i = 0; i < STA_TID_NUM; i++)
                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
-                        sta->ampdu_mlme.tid_tx[i].dialog_token);
+                        sta->ampdu_mlme.tid_state_tx[i]?
+                        sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
 
         p += scnprintf(p, sizeof(buf)+buf-p, "\n SSN :");
         for (i = 0; i < STA_TID_NUM; i++)
                 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
-                        sta->ampdu_mlme.tid_tx[i].ssn);
+                        sta->ampdu_mlme.tid_state_tx[i]?
+                        sta->ampdu_mlme.tid_tx[i]->ssn : 0);
 
         p += scnprintf(p, sizeof(buf)+buf-p, "\n");
 
@@ -230,12 +233,12 @@ static ssize_t sta_agg_status_write(struct file *file,
                         strcpy(state, "off ");
                         ieee80211_sta_stop_rx_ba_session(dev, da, tid_num, 0,
                                         WLAN_REASON_QSTA_REQUIRE_SETUP);
-                        sta->ampdu_mlme.tid_rx[tid_num].state |=
+                        sta->ampdu_mlme.tid_state_rx[tid_num] |=
                                         HT_AGG_STATE_DEBUGFS_CTL;
                         tid_static_rx[tid_num] = 0;
                 } else {
                         strcpy(state, "on ");
-                        sta->ampdu_mlme.tid_rx[tid_num].state &=
+                        sta->ampdu_mlme.tid_state_rx[tid_num] &=
                                         ~HT_AGG_STATE_DEBUGFS_CTL;
                         tid_static_rx[tid_num] = 1;
                 }