Bluetooth: Initialize new l2cap_chan structure members

Structure members used by ERTM or streaming mode need to be
initialized when an ERTM or streaming mode link is configured.  Some
duplicate code is also eliminated by moving in to the ERTM init
function.
Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo Padovan <gustavo@padovan.org>

net/bluetooth/l2cap_core.c

@@ -2314,17 +2314,30 @@ static inline int l2cap_ertm_init(struct l2cap_chan *chan)
 {
 	int err;
 
+	chan->next_tx_seq = 0;
+	chan->expected_tx_seq = 0;
 	chan->expected_ack_seq = 0;
 	chan->unacked_frames = 0;
 	chan->buffer_seq = 0;
 	chan->num_acked = 0;
 	chan->frames_sent = 0;
+	chan->last_acked_seq = 0;
+	chan->sdu = NULL;
+	chan->sdu_last_frag = NULL;
+	chan->sdu_len = 0;
+
+	if (chan->mode != L2CAP_MODE_ERTM)
+		return 0;
+
+	chan->rx_state = L2CAP_RX_STATE_RECV;
+	chan->tx_state = L2CAP_TX_STATE_XMIT;
 
 	INIT_DELAYED_WORK(&chan->retrans_timer, l2cap_retrans_timeout);
 	INIT_DELAYED_WORK(&chan->monitor_timer, l2cap_monitor_timeout);
 	INIT_DELAYED_WORK(&chan->ack_timer, l2cap_ack_timeout);
 
 	skb_queue_head_init(&chan->srej_q);
+	skb_queue_head_init(&chan->tx_q);
 
 	INIT_LIST_HEAD(&chan->srej_l);
 	err = l2cap_seq_list_init(&chan->srej_list, chan->tx_win);
@@ -3192,10 +3205,8 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
 
 		l2cap_state_change(chan, BT_CONNECTED);
 
-		chan->next_tx_seq = 0;
-		chan->expected_tx_seq = 0;
-		skb_queue_head_init(&chan->tx_q);
-		if (chan->mode == L2CAP_MODE_ERTM)
+		if (chan->mode == L2CAP_MODE_ERTM ||
+		    chan->mode == L2CAP_MODE_STREAMING)
 			err = l2cap_ertm_init(chan);
 
 		if (err < 0)
@@ -3327,10 +3338,8 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr
 		set_default_fcs(chan);
 
 		l2cap_state_change(chan, BT_CONNECTED);
-		chan->next_tx_seq = 0;
-		chan->expected_tx_seq = 0;
-		skb_queue_head_init(&chan->tx_q);
-		if (chan->mode ==  L2CAP_MODE_ERTM)
+		if (chan->mode == L2CAP_MODE_ERTM ||
+		    chan->mode == L2CAP_MODE_STREAMING)
 			err = l2cap_ertm_init(chan);
 
 		if (err < 0)