net/mlx4_en: remove fallback after kzalloc_node()

kzalloc_node(..., GFP_KERNEL, node) will attempt to allocate
memory as close as possible to the node.

There is no need to fallback to kzalloc() if this has failed.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx4/en_cq.c

@@ -54,11 +54,8 @@ int mlx4_en_create_cq(struct mlx4_en_priv *priv,
 
 	cq = kzalloc_node(sizeof(*cq), GFP_KERNEL, node);
 	if (!cq) {
-		cq = kzalloc(sizeof(*cq), GFP_KERNEL);
-		if (!cq) {
-			en_err(priv, "Failed to allocate CQ structure\n");
-			return -ENOMEM;
-		}
+		en_err(priv, "Failed to allocate CQ structure\n");
+		return -ENOMEM;
 	}
 
 	cq->size = entries;

drivers/net/ethernet/mellanox/mlx4/en_rx.c

@@ -271,11 +271,8 @@ int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv,
 
 	ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, node);
 	if (!ring) {
-		ring = kzalloc(sizeof(*ring), GFP_KERNEL);
-		if (!ring) {
-			en_err(priv, "Failed to allocate RX ring structure\n");
-			return -ENOMEM;
-		}
+		en_err(priv, "Failed to allocate RX ring structure\n");
+		return -ENOMEM;
 	}
 
 	ring->prod = 0;

drivers/net/ethernet/mellanox/mlx4/en_tx.c

@@ -57,11 +57,8 @@ int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv,
 
 	ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, node);
 	if (!ring) {
-		ring = kzalloc(sizeof(*ring), GFP_KERNEL);
-		if (!ring) {
-			en_err(priv, "Failed allocating TX ring\n");
-			return -ENOMEM;
-		}
+		en_err(priv, "Failed allocating TX ring\n");
+		return -ENOMEM;
 	}
 
 	ring->size = size;