Bluetooth: Use general bonding whenever possible

When receiving incoming connection to specific services, always use
general bonding. This ensures that the link key gets stored and can be
used for further authentications.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 2435e83..7fc4c04 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -391,19 +391,14 @@
 EXPORT_SYMBOL(hci_conn_check_link_mode);
 
 /* Authenticate remote device */
-static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level)
+static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
 {
 	BT_DBG("conn %p", conn);
 
-	if (sec_level > conn->sec_level)
-		conn->link_mode &= ~HCI_LM_AUTH;
-
-	conn->sec_level = sec_level;
-
-	if (sec_level == BT_SECURITY_HIGH)
-		conn->auth_type |= 0x01;
-
-	if (conn->link_mode & HCI_LM_AUTH)
+	if (sec_level > conn->sec_level) {
+		conn->sec_level = sec_level;
+		conn->auth_type = auth_type;
+	} else if (conn->link_mode & HCI_LM_AUTH)
 		return 1;
 
 	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
@@ -417,7 +412,7 @@
 }
 
 /* Enable security */
-int hci_conn_security(struct hci_conn *conn, __u8 sec_level)
+int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
 {
 	BT_DBG("conn %p", conn);
 
@@ -426,18 +421,18 @@
 
 	if (sec_level == BT_SECURITY_LOW) {
 		if (conn->ssp_mode > 0 && conn->hdev->ssp_mode > 0)
-			return hci_conn_auth(conn, sec_level);
+			return hci_conn_auth(conn, sec_level, auth_type);
 		else
 			return 1;
 	}
 
 	if (conn->link_mode & HCI_LM_ENCRYPT)
-		return hci_conn_auth(conn, sec_level);
+		return hci_conn_auth(conn, sec_level, auth_type);
 
 	if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend))
 		return 0;
 
-	if (hci_conn_auth(conn, sec_level)) {
+	if (hci_conn_auth(conn, sec_level, auth_type)) {
 		struct hci_cp_set_conn_encrypt cp;
 		cp.handle  = cpu_to_le16(conn->handle);
 		cp.encrypt = 1;