net/mlx4_en: RX csum, reorder branches

Use early goto commands, and save else branches.
This uses less indentations and brackets, making the code
more readable.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -816,39 +816,35 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
 		if (likely(dev->features & NETIF_F_RXCSUM)) {
 			if (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_TCP |
 						      MLX4_CQE_STATUS_UDP)) {
-				if ((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) &&
-				    cqe->checksum == cpu_to_be16(0xffff)) {
-					bool l2_tunnel = (dev->hw_enc_features & NETIF_F_RXCSUM) &&
-						(cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_L2_TUNNEL));
+				bool l2_tunnel;
+
+				if (!((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) &&
+				      cqe->checksum == cpu_to_be16(0xffff)))
+					goto csum_none;
 
+				l2_tunnel = (dev->hw_enc_features & NETIF_F_RXCSUM) &&
+					(cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_L2_TUNNEL));
 				ip_summed = CHECKSUM_UNNECESSARY;
 				hash_type = PKT_HASH_TYPE_L4;
 				if (l2_tunnel)
 					skb->csum_level = 1;
 				ring->csum_ok++;
 			} else {
-					goto csum_none;
-				}
-			} else {
-				if (priv->flags & MLX4_EN_FLAG_RX_CSUM_NON_TCP_UDP &&
+				if (!(priv->flags & MLX4_EN_FLAG_RX_CSUM_NON_TCP_UDP &&
 				      (cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
 #if IS_ENABLED(CONFIG_IPV6)
-							       MLX4_CQE_STATUS_IPV6))) {
+								 MLX4_CQE_STATUS_IPV6))))
 #else
-							       0))) {
+								 0))))
 #endif
-					if (check_csum(cqe, skb, va, dev->features)) {
 					goto csum_none;
-					} else {
+				if (check_csum(cqe, skb, va, dev->features))
+					goto csum_none;
 				ip_summed = CHECKSUM_COMPLETE;
 				hash_type = PKT_HASH_TYPE_L3;
 				ring->csum_complete++;
 			}
 		} else {
-					goto csum_none;
-				}
-			}
-		} else {
 csum_none:
 			ip_summed = CHECKSUM_NONE;
 			hash_type = PKT_HASH_TYPE_L3;