Bluetooth: Store latency and supervision timeout in connection params

When the slave updates the connection parameters, store also the
connection latency and supervision timeout information in the
internal list of connection parameters for known devices.

Having these values available allowes the auto-connection
procedure to use the correct values from the beginning without
having to request an update on every connection establishment.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 25ee27ddc882..adb413d77637 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -216,11 +216,23 @@ bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
 void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
 			u16 latency, u16 to_multiplier)
 {
-	struct hci_cp_le_conn_update cp;
 	struct hci_dev *hdev = conn->hdev;
+	struct hci_conn_params *params;
+	struct hci_cp_le_conn_update cp;
 
-	memset(&cp, 0, sizeof(cp));
+	hci_dev_lock(hdev);
+
+	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
+	if (params) {
+		params->conn_min_interval = min;
+		params->conn_max_interval = max;
+		params->conn_latency = latency;
+		params->supervision_timeout = to_multiplier;
+	}
 
+	hci_dev_unlock(hdev);
+
+	memset(&cp, 0, sizeof(cp));
 	cp.handle		= cpu_to_le16(conn->handle);
 	cp.conn_interval_min	= cpu_to_le16(min);
 	cp.conn_interval_max	= cpu_to_le16(max);