Bluetooth: Send control open and close only when cookie is present

Only when the cookie has been assigned, then send the open and close
monitor messages. Also if the socket is bound to a device, then include
the index into the message.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

net/bluetooth/hci_sock.c

@@ -483,6 +483,10 @@ static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
 	u8 ver[3];
 	u32 flags;
 
+	/* No message needed when cookie is not present */
+	if (!hci_pi(sk)->cookie)
+		return NULL;
+
 	skb = bt_skb_alloc(14 + TASK_COMM_LEN , GFP_ATOMIC);
 	if (!skb)
 		return NULL;
@@ -501,7 +505,10 @@ static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
 
 	hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
 	hdr->opcode = cpu_to_le16(HCI_MON_CTRL_OPEN);
-	hdr->index = cpu_to_le16(HCI_DEV_NONE);
+	if (hci_pi(sk)->hdev)
+		hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
+	else
+		hdr->index = cpu_to_le16(HCI_DEV_NONE);
 	hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
 
 	return skb;
@@ -512,6 +519,10 @@ static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
 	struct hci_mon_hdr *hdr;
 	struct sk_buff *skb;
 
+	/* No message needed when cookie is not present */
+	if (!hci_pi(sk)->cookie)
+		return NULL;
+
 	skb = bt_skb_alloc(4, GFP_ATOMIC);
 	if (!skb)
 		return NULL;
@@ -522,7 +533,10 @@ static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
 
 	hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
 	hdr->opcode = cpu_to_le16(HCI_MON_CTRL_CLOSE);
-	hdr->index = cpu_to_le16(HCI_DEV_NONE);
+	if (hci_pi(sk)->hdev)
+		hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
+	else
+		hdr->index = cpu_to_le16(HCI_DEV_NONE);
 	hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
 
 	return skb;