Bluetooth: Create HCI device debugfs directory in hci_register_dev

Create the debugfs directory for each HCI device directly in
hci_register_dev function and remove it during hci_unregister_dev.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 0fb9f6d..f7ba818 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2479,6 +2479,9 @@
 		goto err;
 	}
 
+	if (!IS_ERR_OR_NULL(bt_debugfs))
+		hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
+
 	error = hci_add_sysfs(hdev);
 	if (error < 0)
 		goto err_wqueue;
@@ -2569,6 +2572,8 @@
 
 	hci_del_sysfs(hdev);
 
+	debugfs_remove_recursive(hdev->debugfs);
+
 	destroy_workqueue(hdev->workqueue);
 	destroy_workqueue(hdev->req_workqueue);