--- linux-2.6-hso-my/drivers/net/usb/hso.c.orig	2008-04-25 16:13:41.000000000 +0300
+++ linux-2.6-hso-my/drivers/net/usb/hso.c	2008-04-28 12:34:23.000000000 +0300
@@ -2210,7 +2210,8 @@ static void hso_free_serial_device(struc
 		mutex_lock(&serial->shared_int->shared_int_lock);
 		if (--serial->shared_int->ref_count == 0)
 			hso_free_shared_int(serial->shared_int);
-		mutex_unlock(&serial->shared_int->shared_int_lock);
+		else
+			mutex_unlock(&serial->shared_int->shared_int_lock);
 	}
 	kfree(serial);
 	hso_free_device(hso_dev);
@@ -2360,6 +2361,7 @@ static void hso_free_shared_int(struct h
 {
 	usb_free_urb(mux->shared_intr_urb);
 	kfree(mux->shared_intr_buf);
+	mutex_unlock(&mux->shared_int_lock);
 	kfree(mux);
 }