Bluetooth: Track number of added devices with HCI_AUTO_CONN_REPORT

To be able to make the right choice of whether to start passive scanning
or to send out a mgmt_device_found event we need to know if there are
any devices in the le_conn_params list with the auto_connect value set
to HCI_AUTO_CONN_REPORT. This patch adds a counter for this kind of
devices.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci_core.h

@@ -312,6 +312,7 @@ struct hci_dev {
 	struct list_head	le_white_list;
 	struct list_head	le_conn_params;
 	struct list_head	pend_le_conns;
+	unsigned int		pend_le_reports;
 
 	struct hci_dev_stats	stat;
 

net/bluetooth/hci_core.c

@@ -3545,20 +3545,28 @@ int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
 	if (!params)
 		return -EIO;
 
-	params->auto_connect = auto_connect;
+	if (params->auto_connect == HCI_AUTO_CONN_REPORT &&
+	    auto_connect != HCI_AUTO_CONN_REPORT)
+		hdev->pend_le_reports--;
 
 	switch (auto_connect) {
 	case HCI_AUTO_CONN_DISABLED:
-	case HCI_AUTO_CONN_REPORT:
 	case HCI_AUTO_CONN_LINK_LOSS:
 		hci_pend_le_conn_del(hdev, addr, addr_type);
 		break;
+	case HCI_AUTO_CONN_REPORT:
+		if (params->auto_connect != HCI_AUTO_CONN_REPORT)
+			hdev->pend_le_reports++;
+		hci_pend_le_conn_del(hdev, addr, addr_type);
+		break;
 	case HCI_AUTO_CONN_ALWAYS:
 		if (!is_connected(hdev, addr, addr_type))
 			hci_pend_le_conn_add(hdev, addr, addr_type);
 		break;
 	}
 
+	params->auto_connect = auto_connect;
+
 	BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
 	       auto_connect);
 
@@ -3574,6 +3582,9 @@ void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
 	if (!params)
 		return;
 
+	if (params->auto_connect == HCI_AUTO_CONN_REPORT)
+		hdev->pend_le_reports--;
+
 	hci_pend_le_conn_del(hdev, addr, addr_type);
 
 	list_del(&params->list);
@@ -3605,6 +3616,8 @@ void hci_conn_params_clear_enabled(struct hci_dev *hdev)
 	list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
 		if (params->auto_connect == HCI_AUTO_CONN_DISABLED)
 			continue;
+		if (params->auto_connect == HCI_AUTO_CONN_REPORT)
+			hdev->pend_le_reports--;
 		list_del(&params->list);
 		kfree(params);
 	}