net: use NLMSG_DEFAULT_SIZE in nlmsg_new() allocations

nlmsg_new() adds the size of the netlink header to the value
that has been passed as parameter. If NLMSG_GOODSIZE is selected,
we request an allocation of one memory page plus the size of the
header. Instead, NLMSG_DEFAULT_SIZE should be used since it
already substracts the size of the Netlink header.

I have the impression that the similar naming in both constant
is error prone when using it with nlmsg_new(). This is already
documented in include/net/netlink.h

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/irda/irnetlink.c b/net/irda/irnetlink.c
index 2f05ec1..82c6118 100644
--- a/net/irda/irnetlink.c
+++ b/net/irda/irnetlink.c
@@ -87,7 +87,7 @@
 	if (!dev)
 		return -ENODEV;
 
-	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 	if (!msg) {
 		dev_put(dev);
 		return -ENOMEM;