Fix dm_swap_table __bind error case - missing unlock!

[submitted to -mm but without dm_suspended change]

--- diff/drivers/md/dm.c	2005-07-06 19:02:19.000000000 +0100
+++ source/drivers/md/dm.c	2005-07-06 19:02:16.000000000 +0100
@@ -962,23 +962,20 @@
  */
 int dm_swap_table(struct mapped_device *md, struct dm_table *table)
 {
-	int r;
+	int r = -EINVAL;
 
 	down_write(&md->lock);
 
 	/* device must be suspended */
-	if (!dm_suspended(md)) {
-		up_write(&md->lock);
-		return -EPERM;
-	}
+	if (!dm_suspended(md))
+		goto out;
 
 	__unbind(md);
 	r = __bind(md, table);
-	if (r)
-		return r;
 
+out:
 	up_write(&md->lock);
-	return 0;
+	return r;
 }
 
 /*