openvswitch: Fix multipart datapath dumps.

The logic to split up the list of datapaths into multiple Netlink messages
was simply wrong, causing the list to be terminated after the first part.
Only about the first 50 datapaths would be dumped.  This fixes the
problem.

Reported-by: Paul Ingram <paul@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/openvswitch/datapath.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007-2011 Nicira Networks.
+ * Copyright (c) 2007-2012 Nicira Networks.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of version 2 of the GNU General Public
@@ -1396,9 +1396,8 @@ static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
 	int i = 0;
 
 	list_for_each_entry(dp, &dps, list_node) {
-		if (i < skip)
-			continue;
-		if (ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid,
+		if (i >= skip &&
+		    ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid,
 					 cb->nlh->nlmsg_seq, NLM_F_MULTI,
 					 OVS_DP_CMD_NEW) < 0)
 			break;