Index: linux/net/bluetooth/rfcomm/tty.c
===================================================================
--- linux.orig/net/bluetooth/rfcomm/tty.c
+++ linux/net/bluetooth/rfcomm/tty.c
@@ -36,6 +36,7 @@
 #include <linux/capability.h>
 #include <linux/slab.h>
 #include <linux/skbuff.h>
+#include <linux/err.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -182,6 +183,7 @@ static int rfcomm_dev_add(struct rfcomm_
 {
 	struct rfcomm_dev *dev;
 	struct list_head *head = &rfcomm_dev_list, *p;
+	struct class_device *class;
 	int err = 0;
 
 	BT_DBG("id %d channel %d", req->dev_id, req->channel);
@@ -261,7 +263,11 @@ out:
 		return err;
 	}
 
-	tty_register_device(rfcomm_tty_driver, dev->id, rfcomm_get_device(dev));
+	class = tty_register_device(rfcomm_tty_driver, dev->id, rfcomm_get_device(dev));
+	if (IS_ERR(class))
+		printk("rfcomm_dev_add error %d\n", PTR_ERR(class));
+	else
+		printk("rfcomm_dev_add succeeded\n");
 
 	return dev->id;
 }