netdev - [PATCH net v2 1/4] net: wangxun: fix the incorrect display of queue number in statistics

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Date: Mon, 29 Apr 2024 18:25:16 +0800
From: Jiawen Wu <jiawenwu@...stnetic.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	rmk+kernel@...linux.org.uk,
	andrew@...n.ch,
	netdev@...r.kernel.org
Cc: mengyuanlou@...-swift.com,
	duanqiangwen@...-swift.com,
	Jiawen Wu <jiawenwu@...stnetic.com>
Subject: [PATCH net v2 1/4] net: wangxun: fix the incorrect display of queue number in statistics

When using ethtool -S to print hardware statistics, the number of
Rx/Tx queues printed is greater than the number of queues actually
used.

Fixes: 46b92e10d631 ("net: libwx: support hardware statistics")
Signed-off-by: Jiawen Wu <jiawenwu@...stnetic.com>
---
 .../net/ethernet/wangxun/libwx/wx_ethtool.c   | 23 +++++++++----------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
index cc3bec42ed8e..803c7f1da9a4 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
@@ -59,9 +59,12 @@ static const struct wx_stats wx_gstrings_stats[] = {
 
 int wx_get_sset_count(struct net_device *netdev, int sset)
 {
+	struct wx *wx = netdev_priv(netdev);
+
 	switch (sset) {
 	case ETH_SS_STATS:
-		return WX_STATS_LEN;
+		return WX_STATS_LEN - (WX_NUM_RX_QUEUES - wx->num_tx_queues) *
+		       (sizeof(struct wx_queue_stats) / sizeof(u64)) * 2;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -70,6 +73,7 @@ EXPORT_SYMBOL(wx_get_sset_count);
 
 void wx_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 {
+	struct wx *wx = netdev_priv(netdev);
 	u8 *p = data;
 	int i;
 
@@ -77,11 +81,11 @@ void wx_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 	case ETH_SS_STATS:
 		for (i = 0; i < WX_GLOBAL_STATS_LEN; i++)
 			ethtool_puts(&p, wx_gstrings_stats[i].stat_string);
-		for (i = 0; i < netdev->num_tx_queues; i++) {
+		for (i = 0; i < wx->num_tx_queues; i++) {
 			ethtool_sprintf(&p, "tx_queue_%u_packets", i);
 			ethtool_sprintf(&p, "tx_queue_%u_bytes", i);
 		}
-		for (i = 0; i < WX_NUM_RX_QUEUES; i++) {
+		for (i = 0; i < wx->num_rx_queues; i++) {
 			ethtool_sprintf(&p, "rx_queue_%u_packets", i);
 			ethtool_sprintf(&p, "rx_queue_%u_bytes", i);
 		}
@@ -107,7 +111,7 @@ void wx_get_ethtool_stats(struct net_device *netdev,
 			   sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
 	}
 
-	for (j = 0; j < netdev->num_tx_queues; j++) {
+	for (j = 0; j < wx->num_tx_queues; j++) {
 		ring = wx->tx_ring[j];
 		if (!ring) {
 			data[i++] = 0;
@@ -122,7 +126,7 @@ void wx_get_ethtool_stats(struct net_device *netdev,
 		} while (u64_stats_fetch_retry(&ring->syncp, start));
 		i += 2;
 	}
-	for (j = 0; j < WX_NUM_RX_QUEUES; j++) {
+	for (j = 0; j < wx->num_rx_queues; j++) {
 		ring = wx->rx_ring[j];
 		if (!ring) {
 			data[i++] = 0;
@@ -177,13 +181,8 @@ void wx_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 	strscpy(info->driver, wx->driver_name, sizeof(info->driver));
 	strscpy(info->fw_version, wx->eeprom_id, sizeof(info->fw_version));
 	strscpy(info->bus_info, pci_name(wx->pdev), sizeof(info->bus_info));
-	if (wx->num_tx_queues <= WX_NUM_TX_QUEUES) {
-		info->n_stats = WX_STATS_LEN -
-				   (WX_NUM_TX_QUEUES - wx->num_tx_queues) *
-				   (sizeof(struct wx_queue_stats) / sizeof(u64)) * 2;
-	} else {
-		info->n_stats = WX_STATS_LEN;
-	}
+	info->n_stats = WX_STATS_LEN - (WX_NUM_TX_QUEUES - wx->num_tx_queues) *
+			(sizeof(struct wx_queue_stats) / sizeof(u64)) * 2;
 }
 EXPORT_SYMBOL(wx_get_drvinfo);
 
-- 
2.27.0