Bluetooth: Track LE connection parameter update event

When the LE controller changes its connection parameters, it will send
a connection parameter update event. Make sure that the new set of
parameters are stored in hci_conn struct and thus will properly update
the previous values retrieved from the connection complete event.

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

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 3f3a3f1..6b8371d 100644 (file)
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1666,6 +1666,15 @@ struct hci_ev_le_conn_complete {
        __u8     clk_accurancy;
 } __packed;
 
+#define HCI_EV_LE_CONN_UPDATE_COMPLETE 0x03
+struct hci_ev_le_conn_update_complete {
+       __u8     status;
+       __le16   handle;
+       __le16   interval;
+       __le16   latency;
+       __le16   supervision_timeout;
+} __packed;
+
 #define HCI_EV_LE_LTK_REQ              0x05
 struct hci_ev_le_ltk_req {
        __le16  handle;

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 3d4741d..e239435 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -4070,6 +4070,29 @@ unlock:
        hci_dev_unlock(hdev);
 }
 
+static void hci_le_conn_update_complete_evt(struct hci_dev *hdev,
+                                           struct sk_buff *skb)
+{
+       struct hci_ev_le_conn_update_complete *ev = (void *) skb->data;
+       struct hci_conn *conn;
+
+       BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+       if (ev->status)
+               return;
+
+       hci_dev_lock(hdev);
+
+       conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+       if (conn) {
+               conn->le_conn_interval = le16_to_cpu(ev->interval);
+               conn->le_conn_latency = le16_to_cpu(ev->latency);
+               conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
+       }
+
+       hci_dev_unlock(hdev);
+}
+
 /* This function requires the caller holds hdev->lock */
 static void check_pending_le_conn(struct hci_dev *hdev, bdaddr_t *addr,
                                  u8 addr_type)
@@ -4269,6 +4292,10 @@ static void hci_le_meta_evt(struct hci_dev *hdev, struct sk_buff *skb)
                hci_le_conn_complete_evt(hdev, skb);
                break;
 
+       case HCI_EV_LE_CONN_UPDATE_COMPLETE:
+               hci_le_conn_update_complete_evt(hdev, skb);
+               break;
+
        case HCI_EV_LE_ADVERTISING_REPORT:
                hci_le_adv_report_evt(hdev, skb);
                break;