3 files changed, 24 insertions, 7 deletions

diff --git a/drivers/net/wireless/mwifiex/11n_rxreorder.c b/drivers/net/wireless/mwifiex/11n_rxreorder.c
index eb17282b364f..35329cfc9a9b 100644
--- a/drivers/net/wireless/mwifiex/11n_rxreorder.c
+++ b/drivers/net/wireless/mwifiex/11n_rxreorder.c
@@ -279,6 +279,8 @@ mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta,
 	new_node->tid = tid;
 	memcpy(new_node->ta, ta, ETH_ALEN);
 	new_node->start_win = seq_num;
+	new_node->init_win = seq_num;
+	new_node->flags = 0;
 
 	if (mwifiex_queuing_ra_based(priv)) {
 		dev_dbg(priv->adapter->dev,
@@ -298,11 +300,12 @@ mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta,
 	}
 
 	if (last_seq != MWIFIEX_DEF_11N_RX_SEQ_NUM &&
-	    last_seq >= new_node->start_win)
+	    last_seq >= new_node->start_win) {
 		new_node->start_win = last_seq + 1;
+		new_node->flags |= RXREOR_INIT_WINDOW_SHIFT;
+	}
 
 	new_node->win_size = win_size;
-	new_node->flags = 0;
 
 	new_node->rx_reorder_ptr = kzalloc(sizeof(void *) * win_size,
 					GFP_KERNEL);
@@ -452,6 +455,7 @@ int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
 	struct mwifiex_rx_reorder_tbl *tbl;
 	int start_win, end_win, win_size;
 	u16 pkt_index;
+	bool init_window_shift = false;
 
 	tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
 	if (!tbl) {
@@ -466,18 +470,29 @@ int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
 	start_win = tbl->start_win;
 	win_size = tbl->win_size;
 	end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
+	if (tbl->flags & RXREOR_INIT_WINDOW_SHIFT) {
+		init_window_shift = true;
+		tbl->flags &= ~RXREOR_INIT_WINDOW_SHIFT;
+	}
 	mod_timer(&tbl->timer_context.timer,
 		  jiffies + msecs_to_jiffies(MIN_FLUSH_TIMER_MS * win_size));
 
-	/*
-	 * If seq_num is less then starting win then ignore and drop the
-	 * packet
-	 */
 	if (tbl->flags & RXREOR_FORCE_NO_DROP) {
 		dev_dbg(priv->adapter->dev,
 			"RXREOR_FORCE_NO_DROP when HS is activated\n");
 		tbl->flags &= ~RXREOR_FORCE_NO_DROP;
+	} else if (init_window_shift && seq_num < start_win &&
+		   seq_num >= tbl->init_win) {
+		dev_dbg(priv->adapter->dev,
+			"Sender TID sequence number reset %d->%d for SSN %d\n",
+			start_win, seq_num, tbl->init_win);
+		tbl->start_win = start_win = seq_num;
+		end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
 	} else {
+		/*
+		 * If seq_num is less then starting win then ignore and drop
+		 * the packet
+		 */
 		if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
 			if (seq_num >= ((start_win + TWOPOW11) &
 					(MAX_TID_VALUE - 1)) &&
diff --git a/drivers/net/wireless/mwifiex/11n_rxreorder.h b/drivers/net/wireless/mwifiex/11n_rxreorder.h
index 4064041ac852..0fc76e4a60f8 100644
--- a/drivers/net/wireless/mwifiex/11n_rxreorder.h
+++ b/drivers/net/wireless/mwifiex/11n_rxreorder.h
@@ -42,7 +42,8 @@
 #define BA_SETUP_PACKET_OFFSET		16
 
 enum mwifiex_rxreor_flags {
-	RXREOR_FORCE_NO_DROP	= 1<<0,
+	RXREOR_FORCE_NO_DROP		= 1<<0,
+	RXREOR_INIT_WINDOW_SHIFT	= 1<<1,
 };
 
 static inline void mwifiex_reset_11n_rx_seq_num(struct mwifiex_private *priv)
diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index 407f8eada720..cb1148f0de69 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -575,6 +575,7 @@ struct mwifiex_rx_reorder_tbl {
 	struct list_head list;
 	int tid;
 	u8 ta[ETH_ALEN];
+	int init_win;
 	int start_win;
 	int win_size;
 	void **rx_reorder_ptr;