From 6a7c7c31b57bb4dadaf3750a3fc36e3ec0761f3f Mon Sep 17 00:00:00 2001
From: Huisong Li <lihuisong@huawei.com>
Date: Sat, 11 Feb 2023 17:18:25 +0800
Subject: net/hns3: fix burst mode query with dummy function

[ upstream commit 10f91af5a5b370df922f888826a4387abebe1cde ]

The rte_eth_rx/tx_burst_mode_get API will fail when Rx/Tx
function is dummy.

Fixes: 7ef933908f04 ("net/hns3: add simple Tx path")
Fixes: 521ab3e93361 ("net/hns3: add simple Rx path")
Cc: stable@dpdk.org

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
---
 drivers/net/hns3/hns3_rxtx.c | 38 ++++++++++++++++++++++--------------
 1 file changed, 23 insertions(+), 15 deletions(-)

diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index 9a597e032e..c69fb38402 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -2786,6 +2786,7 @@ hns3_rx_burst_mode_get(struct rte_eth_dev *dev, __rte_unused uint16_t queue_id,
 		{ hns3_recv_scattered_pkts,	"Scalar Scattered" },
 		{ hns3_recv_pkts_vec,		"Vector Neon"   },
 		{ hns3_recv_pkts_vec_sve,	"Vector Sve"    },
+		{ rte_eth_pkt_burst_dummy,	"Dummy"         },
 	};
 
 	eth_rx_burst_t pkt_burst = dev->rx_pkt_burst;
@@ -4272,24 +4273,31 @@ int
 hns3_tx_burst_mode_get(struct rte_eth_dev *dev, __rte_unused uint16_t queue_id,
 		       struct rte_eth_burst_mode *mode)
 {
+	static const struct {
+		eth_tx_burst_t pkt_burst;
+		const char *info;
+	} burst_infos[] = {
+		{ hns3_xmit_pkts_simple,	"Scalar Simple" },
+		{ hns3_xmit_pkts,		"Scalar"        },
+		{ hns3_xmit_pkts_vec,		"Vector Neon"   },
+		{ hns3_xmit_pkts_vec_sve,	"Vector Sve"    },
+		{ rte_eth_pkt_burst_dummy,	"Dummy"         },
+	};
+
 	eth_tx_burst_t pkt_burst = dev->tx_pkt_burst;
-	const char *info = NULL;
-
-	if (pkt_burst == hns3_xmit_pkts_simple)
-		info = "Scalar Simple";
-	else if (pkt_burst == hns3_xmit_pkts)
-		info = "Scalar";
-	else if (pkt_burst == hns3_xmit_pkts_vec)
-		info = "Vector Neon";
-	else if (pkt_burst == hns3_xmit_pkts_vec_sve)
-		info = "Vector Sve";
-
-	if (info == NULL)
-		return -EINVAL;
+	int ret = -EINVAL;
+	unsigned int i;
 
-	snprintf(mode->info, sizeof(mode->info), "%s", info);
+	for (i = 0; i < RTE_DIM(burst_infos); i++) {
+		if (pkt_burst == burst_infos[i].pkt_burst) {
+			snprintf(mode->info, sizeof(mode->info), "%s",
+				 burst_infos[i].info);
+			ret = 0;
+			break;
+		}
+	}
 
-	return 0;
+	return ret;
 }
 
 static bool
-- 
2.23.0