diff --git a/drivers/net/ethernet/chelsio/cxgb3/l2t.c b/drivers/net/ethernet/chelsio/cxgb3/l2t.c
index 0e9182d3f02c665306508d7b11278fb457292ede..b3e4118a15e700364292aba4c343f3dc67d9e849 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/l2t.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/l2t.c
@@ -443,9 +443,9 @@ void t3_l2t_update(struct t3cdev *dev, struct neighbour *neigh)
 struct l2t_data *t3_init_l2t(unsigned int l2t_capacity)
 {
 	struct l2t_data *d;
-	int i, size = sizeof(*d) + l2t_capacity * sizeof(struct l2t_entry);
+	int i;
 
-	d = kvzalloc(size, GFP_KERNEL);
+	d = kvzalloc(struct_size(d, l2tab, l2t_capacity), GFP_KERNEL);
 	if (!d)
 		return NULL;
 
diff --git a/drivers/net/ethernet/chelsio/cxgb3/l2t.h b/drivers/net/ethernet/chelsio/cxgb3/l2t.h
index c2fd323c4078284ac84aa58825cc84958f108fe8..ea75f275023ffad95a4e2dfa46b1db51935417d8 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/l2t.h
+++ b/drivers/net/ethernet/chelsio/cxgb3/l2t.h
@@ -75,8 +75,8 @@ struct l2t_data {
 	struct l2t_entry *rover;	/* starting point for next allocation */
 	atomic_t nfree;		/* number of free entries */
 	rwlock_t lock;
-	struct l2t_entry l2tab[0];
 	struct rcu_head rcu_head;	/* to handle rcu cleanup */
+	struct l2t_entry l2tab[];
 };
 
 typedef void (*arp_failure_handler_func)(struct t3cdev * dev,