Bluetooth: Do not trigger background scanning when HCI_AUTO_OFF is set

When a new controller is initialized, but not powered from userspace
at the moment, the HCI_AUTO_OFF flag is still set. During this period,
userspace might program device for auto-connection, but never power
on the controller. In this case do not try to start background
scanning and leave it for later to be started.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

net/bluetooth/hci_core.c

@@ -5306,6 +5306,7 @@ void hci_update_background_scan(struct hci_dev *hdev)
 	if (!test_bit(HCI_UP, &hdev->flags) ||
 	    test_bit(HCI_INIT, &hdev->flags) ||
 	    test_bit(HCI_SETUP, &hdev->dev_flags) ||
+	    test_bit(HCI_AUTO_OFF, &hdev->dev_flags) ||
 	    test_bit(HCI_UNREGISTER, &hdev->dev_flags))
 		return;