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From:   Marcel Holtmann <marcel@holtmann.org>
To:     linux-bluetooth@vger.kernel.org
Subject: [PATCH 3/4] Bluetooth: Enable LE Enhanced Connection Complete event.
Date:   Thu,  9 Apr 2020 08:05:49 +0200
Message-Id: <6b6ecbf19559cb16793d7ef3e96c1181a32b4df5.1586412226.git.marcel@holtmann.org>
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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>
---
 include/net/bluetooth/hci.h | 1 +
 net/bluetooth/hci_core.c    | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index ff42d05b3e72..1da8cec8e210 100644
--- a/include/net/bluetooth/hci.h
+++ b/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
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 589c4085499c..0d726d59a492 100644
--- a/net/bluetooth/hci_core.c
+++ b/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.
 		 */
-- 
2.25.2