[NETLINK]: Directly return -EINTR from netlink_dump_start()

Now that all users of netlink_dump_start() use netlink_run_queue()
to process the receive queue, it is possible to return -EINTR from
netlink_dump_start() directly, therefore simplying the callers.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 5e52d62..2ff9683 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1856,7 +1856,7 @@
 {
 	struct rtattr *xfrma[XFRMA_MAX];
 	struct xfrm_link *link;
-	int type, min_len, err;
+	int type, min_len;
 
 	type = nlh->nlmsg_type;
 	if (type > XFRM_MSG_MAX)
@@ -1875,10 +1875,7 @@
 		if (link->dump == NULL)
 			return -EINVAL;
 
-		err = netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
-		if (err == 0)
-			err = -EINTR;
-		return err;
+		return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
 	}
 
 	memset(xfrma, 0, sizeof(xfrma));