mac80211: fix wrong Rx A-MPDU control via debugfs

This patch eliminate the use of buf_size as a trigger in favor of a new
flag to control Rx A-MPDU sessions through debugfs

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>

net/mac80211/debugfs_sta.c

@@ -230,11 +230,13 @@ 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].buf_size = 0xFF;
+			sta->ampdu_mlme.tid_rx[tid_num].state |=
+					HT_AGG_STATE_DEBUGFS_CTL;
 			tid_static_rx[tid_num] = 0;
 		} else {
 			strcpy(state, "on ");
-			sta->ampdu_mlme.tid_rx[tid_num].buf_size = 0x00;
+			sta->ampdu_mlme.tid_rx[tid_num].state &=
+					~HT_AGG_STATE_DEBUGFS_CTL;
 			tid_static_rx[tid_num] = 1;
 		}
 		printk(KERN_DEBUG "debugfs - try switching tid %u %s\n",

net/mac80211/sta_info.h

@@ -63,6 +63,7 @@ enum ieee80211_sta_info_flags {
 #define HT_AGG_STATE_OPERATIONAL	(HT_ADDBA_REQUESTED_MSK |	\
 					 HT_ADDBA_DRV_READY_MSK |	\
 					 HT_ADDBA_RECEIVED_MSK)
+#define HT_AGG_STATE_DEBUGFS_CTL	BIT(7)
 
 /**
  * struct tid_ampdu_tx - TID aggregation information (Tx).