gdm72xx: Move away from NLMSG_PUT().

And use nlmsg_data() while we're here too.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/staging/gdm72xx/netlink_k.c b/drivers/staging/gdm72xx/netlink_k.c
index 292af0f..d0cb48a 100644
--- a/drivers/staging/gdm72xx/netlink_k.c
+++ b/drivers/staging/gdm72xx/netlink_k.c
@@ -127,8 +127,12 @@
 	}
 
 	seq++;
-	nlh = NLMSG_PUT(skb, 0, seq, type, len);
-	memcpy(NLMSG_DATA(nlh), msg, len);
+	nlh = nlmsg_put(skb, 0, seq, type, len, 0);
+	if (!nlh) {
+		kfree_skb(skb);
+		return -EMSGSIZE;
+	}
+	memcpy(nlmsg_data(nlh), msg, len);
 
 	NETLINK_CB(skb).pid = 0;
 	NETLINK_CB(skb).dst_group = 0;
@@ -144,7 +148,5 @@
 		}
 		ret = 0;
 	}
-
-nlmsg_failure:
 	return ret;
 }