Bluetooth: Adds set_default function in L2CAP setup

Some parameters in L2CAP chan are set to default similar way in
socket based channels and A2MP channels. Adds common function which
sets all defaults.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo@padovan.org>

include/net/bluetooth/l2cap.h

@@ -915,5 +915,6 @@ int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
 								u32 priority);
 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
 int l2cap_chan_check_security(struct l2cap_chan *chan);
+void l2cap_chan_set_defaults(struct l2cap_chan *chan);
 
 #endif /* __L2CAP_H */

net/bluetooth/l2cap_core.c

@@ -296,6 +296,17 @@ void l2cap_chan_destroy(struct l2cap_chan *chan)
 	l2cap_chan_put(chan);
 }
 
+void l2cap_chan_set_defaults(struct l2cap_chan *chan)
+{
+	chan->fcs  = L2CAP_FCS_CRC16;
+	chan->max_tx = L2CAP_DEFAULT_MAX_TX;
+	chan->tx_win = L2CAP_DEFAULT_TX_WINDOW;
+	chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW;
+	chan->sec_level = BT_SECURITY_LOW;
+
+	set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
+}
+
 static void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
 {
 	BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn,

net/bluetooth/l2cap_sock.c

@@ -1006,12 +1006,8 @@ static void l2cap_sock_init(struct sock *sk, struct sock *parent)
 		} else {
 			chan->mode = L2CAP_MODE_BASIC;
 		}
-		chan->max_tx = L2CAP_DEFAULT_MAX_TX;
-		chan->fcs  = L2CAP_FCS_CRC16;
-		chan->tx_win = L2CAP_DEFAULT_TX_WINDOW;
-		chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW;
-		chan->sec_level = BT_SECURITY_LOW;
-		set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
+
+		l2cap_chan_set_defaults(chan);
 	}
 
 	/* Default config options */