Bluetooth: Use special function to send filter management index events

For sending Index Added, Index Removed, Unconfigured Index Added and
Unconfigured Index Removed managment events the new helper functions
allows taking into account if these events are enabled for a certain
management socket or not.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 174a353..00775c4 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -817,6 +817,16 @@
 			goto done;
 		}
 
+		/* At the moment the index and unconfigured index events
+		 * are enabled unconditionally. Setting them on each
+		 * socket when binding keeps this functionality. They
+		 * however might be cleared later and then sending of these
+		 * events will be disabled, but that is then intentional.
+		 */
+		if (haddr.hci_channel == HCI_CHANNEL_CONTROL) {
+			hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
+		}
 		break;
 	}