Bluetooth: Enable LE Enhanced Connection Complete event.

In case LL Privacy is supported by the controller, it is also a good
idea to use the LE Enhanced Connection Complete event for getting all
information about the new connection and its addresses.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

include/net/bluetooth/hci.h

@@ -460,6 +460,7 @@ enum {
 #define HCI_LE_SLAVE_FEATURES		0x08
 #define HCI_LE_PING			0x10
 #define HCI_LE_DATA_LEN_EXT		0x20
+#define HCI_LE_LL_PRIVACY		0x40
 #define HCI_LE_EXT_SCAN_POLICY		0x80
 #define HCI_LE_PHY_2M			0x01
 #define HCI_LE_PHY_CODED		0x08

net/bluetooth/hci_core.c

@@ -638,6 +638,14 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt)
 		if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
 			events[0] |= 0x40;	/* LE Data Length Change */
 
+		/* If the controller supports LL Privacy feature, enable
+		 * the corresponding event.
+		 */
+		if (hdev->le_features[0] & HCI_LE_LL_PRIVACY)
+			events[1] |= 0x02;	/* LE Enhanced Connection
+						 * Complete
+						 */
+
 		/* If the controller supports Extended Scanner Filter
 		 * Policies, enable the correspondig event.
 		 */