Bluetooth: Allow mgmt_device_found events for kernel-side scanning

When the kernel is doing LE scanning because of one or more devices
added with action 0x00 through the Add Device command we do want to let
mgmt_device_found() to proceed with sending an event. This kind of
devices are tracked with hdev->pend_le_reports, so check this value
before bailing out from the function.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/mgmt.c

@@ -6472,8 +6472,16 @@ void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 	struct smp_irk *irk;
 	size_t ev_size;
 
-	if (!hci_discovery_active(hdev))
-		return;
+	/* Don't send events for a non-kernel initiated discovery. With
+	 * LE one exception is if we have pend_le_reports > 0 in which
+	 * case we're doing passive scanning and want these events.
+	 */
+	if (!hci_discovery_active(hdev)) {
+		if (link_type == ACL_LINK)
+			return;
+		if (link_type == LE_LINK && !hdev->pend_le_reports)
+			return;
+	}
 
 	/* Make sure that the buffer is big enough. The 5 extra bytes
 	 * are for the potential CoD field.