Bluetooth: Enable new LE meta event

The Bluetooth 4.1 introduces a new LE meta event called "LE Remote
Connection Parameter Request" event. In order to the controller
sends this event to host, we should enable it during controller
initialization.
Signed-off-by: NAndre Guedes <andre.guedes@openbossa.org>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci.h

@@ -307,6 +307,9 @@ enum {
 #define LMP_HOST_LE_BREDR	0x04
 #define LMP_HOST_SC		0x08
 
+/* LE features */
+#define HCI_LE_CONN_PARAM_REQ_PROC	0x02
+
 /* Connection modes */
 #define HCI_CM_ACTIVE	0x0000
 #define HCI_CM_HOLD	0x0001

net/bluetooth/hci_core.c

@@ -1611,6 +1611,15 @@ static void hci_init3_req(struct hci_request *req, unsigned long opt)
 
 		memset(events, 0, sizeof(events));
 		events[0] = 0x1f;
+
+		/* If controller supports the Connection Parameters Request
+		 * Link Layer Procedure, enable the corresponding event.
+		 */
+		if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
+			events[0] |= 0x20;	/* LE Remote Connection
+						 * Parameter Request
+						 */
+
 		hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
 			    events);