Bluetooth: Add alloc_skb chan operator

Add channel-specific skb allocation method

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 401d942..1636029 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -899,12 +899,21 @@
 	sk->sk_state = state;
 }
 
+static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan,
+					unsigned long len, int nb, int *err)
+{
+	struct sock *sk = chan->sk;
+
+	return bt_skb_send_alloc(sk, len, nb, err);
+}
+
 static struct l2cap_ops l2cap_chan_ops = {
 	.name		= "L2CAP Socket Interface",
 	.new_connection	= l2cap_sock_new_connection_cb,
 	.recv		= l2cap_sock_recv_cb,
 	.close		= l2cap_sock_close_cb,
 	.state_change	= l2cap_sock_state_change_cb,
+	.alloc_skb	= l2cap_sock_alloc_skb_cb,
 };
 
 static void l2cap_sock_destruct(struct sock *sk)