net/mlx5e: Use ethtool_sprintf/puts() to fill stats strings

Use ethtool_sprintf/puts() helper functions which handle the common
pattern of printing a string into the ethtool strings interface and
incrementing the string pointer by ETH_GSTRING_LEN.

Change the fill_strings callback to accept a **data pointer, and remove
the index and return value.
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240402133043.56322-4-tariqt@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_stats.c

@@ -78,13 +78,10 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(ipsec_hw)
 	unsigned int i;
 
 	if (!priv->ipsec)
-		return idx;
+		return;
 
 	for (i = 0; i < NUM_IPSEC_HW_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       mlx5e_ipsec_hw_stats_desc[i].format);
-
-	return idx;
+		ethtool_puts(data, mlx5e_ipsec_hw_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(ipsec_hw)
@@ -115,9 +112,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(ipsec_sw)
 
 	if (priv->ipsec)
 		for (i = 0; i < NUM_IPSEC_SW_COUNTERS; i++)
-			strcpy(data + (idx++) * ETH_GSTRING_LEN,
-			       mlx5e_ipsec_sw_stats_desc[i].format);
-	return idx;
+			ethtool_puts(data, mlx5e_ipsec_sw_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(ipsec_sw)

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h

@@ -95,7 +95,7 @@ int mlx5e_ktls_init(struct mlx5e_priv *priv);
 void mlx5e_ktls_cleanup(struct mlx5e_priv *priv);
 
 int mlx5e_ktls_get_count(struct mlx5e_priv *priv);
-int mlx5e_ktls_get_strings(struct mlx5e_priv *priv, uint8_t *data);
+void mlx5e_ktls_get_strings(struct mlx5e_priv *priv, uint8_t **data);
 int mlx5e_ktls_get_stats(struct mlx5e_priv *priv, u64 *data);
 
 #else
@@ -144,10 +144,7 @@ static inline bool mlx5e_is_ktls_rx(struct mlx5_core_dev *mdev)
 static inline int mlx5e_ktls_init(struct mlx5e_priv *priv) { return 0; }
 static inline void mlx5e_ktls_cleanup(struct mlx5e_priv *priv) { }
 static inline int mlx5e_ktls_get_count(struct mlx5e_priv *priv) { return 0; }
-static inline int mlx5e_ktls_get_strings(struct mlx5e_priv *priv, uint8_t *data)
-{
-	return 0;
-}
+static inline void mlx5e_ktls_get_strings(struct mlx5e_priv *priv, uint8_t **data) { }
 
 static inline int mlx5e_ktls_get_stats(struct mlx5e_priv *priv, u64 *data)
 {

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_stats.c

@@ -58,20 +58,17 @@ int mlx5e_ktls_get_count(struct mlx5e_priv *priv)
 	return ARRAY_SIZE(mlx5e_ktls_sw_stats_desc);
 }
 
-int mlx5e_ktls_get_strings(struct mlx5e_priv *priv, uint8_t *data)
+void mlx5e_ktls_get_strings(struct mlx5e_priv *priv, uint8_t **data)
 {
-	unsigned int i, n, idx = 0;
+	unsigned int i, n;
 
 	if (!priv->tls)
-		return 0;
+		return;
 
 	n = mlx5e_ktls_get_count(priv);
 
 	for (i = 0; i < n; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       mlx5e_ktls_sw_stats_desc[i].format);
-
-	return n;
+		ethtool_puts(data, mlx5e_ktls_sw_stats_desc[i].format);
 }
 
 int mlx5e_ktls_get_stats(struct mlx5e_priv *priv, u64 *data)

drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec_stats.c

@@ -38,16 +38,13 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(macsec_hw)
 	unsigned int i;
 
 	if (!priv->macsec)
-		return idx;
+		return;
 
 	if (!mlx5e_is_macsec_device(priv->mdev))
-		return idx;
+		return;
 
 	for (i = 0; i < NUM_MACSEC_HW_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       mlx5e_macsec_hw_stats_desc[i].format);
-
-	return idx;
+		ethtool_puts(data, mlx5e_macsec_hw_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(macsec_hw)

drivers/net/ethernet/mellanox/mlx5/core/en_rep.c

@@ -135,9 +135,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(sw_rep)
 	int i;
 
 	for (i = 0; i < NUM_VPORT_REP_SW_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       sw_rep_stats_desc[i].format);
-	return idx;
+		ethtool_puts(data, sw_rep_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(sw_rep)
@@ -176,11 +174,9 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(vport_rep)
 	int i;
 
 	for (i = 0; i < NUM_VPORT_REP_HW_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN, vport_rep_stats_desc[i].format);
+		ethtool_puts(data, vport_rep_stats_desc[i].format);
 	for (i = 0; i < NUM_VPORT_REP_LOOPBACK_COUNTERS(priv->mdev); i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       vport_rep_loopback_stats_desc[i].format);
-	return idx;
+		ethtool_puts(data, vport_rep_loopback_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(vport_rep)

drivers/net/ethernet/mellanox/mlx5/core/en_stats.c

@@ -97,10 +97,10 @@ void mlx5e_stats_fill_strings(struct mlx5e_priv *priv, u8 *data)
 {
 	mlx5e_stats_grp_t *stats_grps = priv->profile->stats_grps;
 	const unsigned int num_stats_grps = stats_grps_num(priv);
-	int i, idx = 0;
+	int i;
 
 	for (i = 0; i < num_stats_grps; i++)
-		idx = stats_grps[i]->fill_strings(priv, data, idx);
+		stats_grps[i]->fill_strings(priv, &data);
 }
 
 /* Concrete NIC Stats */
@@ -257,8 +257,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(sw)
 	int i;
 
 	for (i = 0; i < NUM_SW_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN, sw_stats_desc[i].format);
-	return idx;
+		ethtool_puts(data, sw_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(sw)
@@ -591,14 +590,10 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(qcnt)
 	int i;
 
 	for (i = 0; i < NUM_Q_COUNTERS && q_counter_any(priv); i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       q_stats_desc[i].format);
+		ethtool_puts(data, q_stats_desc[i].format);
 
 	for (i = 0; i < NUM_DROP_RQ_COUNTERS && priv->drop_rq_q_counter; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       drop_rq_stats_desc[i].format);
-
-	return idx;
+		ethtool_puts(data, drop_rq_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(qcnt)
@@ -685,18 +680,13 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(vnic_env)
 	int i;
 
 	for (i = 0; i < NUM_VNIC_ENV_STEER_COUNTERS(priv->mdev); i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       vnic_env_stats_steer_desc[i].format);
+		ethtool_puts(data, vnic_env_stats_steer_desc[i].format);
 
 	for (i = 0; i < NUM_VNIC_ENV_DEV_OOB_COUNTERS(priv->mdev); i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       vnic_env_stats_dev_oob_desc[i].format);
+		ethtool_puts(data, vnic_env_stats_dev_oob_desc[i].format);
 
 	for (i = 0; i < NUM_VNIC_ENV_DROP_COUNTERS(priv->mdev); i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       vnic_env_stats_drop_desc[i].format);
-
-	return idx;
+		ethtool_puts(data, vnic_env_stats_drop_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(vnic_env)
@@ -798,13 +788,10 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(vport)
 	int i;
 
 	for (i = 0; i < NUM_VPORT_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN, vport_stats_desc[i].format);
+		ethtool_puts(data, vport_stats_desc[i].format);
 
 	for (i = 0; i < NUM_VPORT_LOOPBACK_COUNTERS(priv->mdev); i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       vport_loopback_stats_desc[i].format);
-
-	return idx;
+		ethtool_puts(data, vport_loopback_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(vport)
@@ -868,8 +855,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(802_3)
 	int i;
 
 	for (i = 0; i < NUM_PPORT_802_3_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN, pport_802_3_stats_desc[i].format);
-	return idx;
+		ethtool_puts(data, pport_802_3_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(802_3)
@@ -1029,8 +1015,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(2863)
 	int i;
 
 	for (i = 0; i < NUM_PPORT_2863_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN, pport_2863_stats_desc[i].format);
-	return idx;
+		ethtool_puts(data, pport_2863_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(2863)
@@ -1088,8 +1073,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(2819)
 	int i;
 
 	for (i = 0; i < NUM_PPORT_2819_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN, pport_2819_stats_desc[i].format);
-	return idx;
+		ethtool_puts(data, pport_2819_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(2819)
@@ -1215,21 +1199,18 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(phy)
 	struct mlx5_core_dev *mdev = priv->mdev;
 	int i;
 
-	strcpy(data + (idx++) * ETH_GSTRING_LEN, "link_down_events_phy");
+	ethtool_puts(data, "link_down_events_phy");
 
 	if (!MLX5_CAP_PCAM_FEATURE(mdev, ppcnt_statistical_group))
-		return idx;
+		return;
 
 	for (i = 0; i < NUM_PPORT_PHY_STATISTICAL_COUNTERS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       pport_phy_statistical_stats_desc[i].format);
+		ethtool_puts(data, pport_phy_statistical_stats_desc[i].format);
 
 	if (MLX5_CAP_PCAM_FEATURE(mdev, per_lane_error_counters))
 		for (i = 0; i < NUM_PPORT_PHY_STATISTICAL_PER_LANE_COUNTERS; i++)
-			strcpy(data + (idx++) * ETH_GSTRING_LEN,
-			       pport_phy_statistical_err_lanes_stats_desc[i].format);
-
-	return idx;
+			ethtool_puts(data,
+				     pport_phy_statistical_err_lanes_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(phy)
@@ -1436,9 +1417,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(eth_ext)
 
 	if (MLX5_CAP_PCAM_FEATURE((priv)->mdev, rx_buffer_fullness_counters))
 		for (i = 0; i < NUM_PPORT_ETH_EXT_COUNTERS; i++)
-			strcpy(data + (idx++) * ETH_GSTRING_LEN,
-			       pport_eth_ext_stats_desc[i].format);
-	return idx;
+			ethtool_puts(data, pport_eth_ext_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(eth_ext)
@@ -1516,19 +1495,16 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(pcie)
 
 	if (MLX5_CAP_MCAM_FEATURE((priv)->mdev, pcie_performance_group))
 		for (i = 0; i < NUM_PCIE_PERF_COUNTERS; i++)
-			strcpy(data + (idx++) * ETH_GSTRING_LEN,
-			       pcie_perf_stats_desc[i].format);
+			ethtool_puts(data, pcie_perf_stats_desc[i].format);
 
 	if (MLX5_CAP_MCAM_FEATURE((priv)->mdev, tx_overflow_buffer_pkt))
 		for (i = 0; i < NUM_PCIE_PERF_COUNTERS64; i++)
-			strcpy(data + (idx++) * ETH_GSTRING_LEN,
-			       pcie_perf_stats_desc64[i].format);
+			ethtool_puts(data, pcie_perf_stats_desc64[i].format);
 
 	if (MLX5_CAP_MCAM_FEATURE((priv)->mdev, pcie_outbound_stalled))
 		for (i = 0; i < NUM_PCIE_PERF_STALL_COUNTERS; i++)
-			strcpy(data + (idx++) * ETH_GSTRING_LEN,
-			       pcie_perf_stall_stats_desc[i].format);
-	return idx;
+			ethtool_puts(data,
+				     pcie_perf_stall_stats_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(pcie)
@@ -1609,18 +1585,18 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(per_port_buff_congest)
 	int i, prio;
 
 	if (!MLX5_CAP_GEN(mdev, sbcam_reg))
-		return idx;
+		return;
 
 	for (prio = 0; prio < NUM_PPORT_PRIO; prio++) {
 		for (i = 0; i < NUM_PPORT_PER_TC_PRIO_COUNTERS; i++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				pport_per_tc_prio_stats_desc[i].format, prio);
+			ethtool_sprintf(data,
+					pport_per_tc_prio_stats_desc[i].format,
+					prio);
 		for (i = 0; i < NUM_PPORT_PER_TC_CONGEST_PRIO_COUNTERS; i++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				pport_per_tc_congest_prio_stats_desc[i].format, prio);
+			ethtool_sprintf(data,
+					pport_per_tc_congest_prio_stats_desc[i].format,
+					prio);
 	}
-
-	return idx;
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(per_port_buff_congest)
@@ -1728,19 +1704,17 @@ static int mlx5e_grp_per_prio_traffic_get_num_stats(void)
 	return NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS * NUM_PPORT_PRIO;
 }
 
-static int mlx5e_grp_per_prio_traffic_fill_strings(struct mlx5e_priv *priv,
-						   u8 *data,
-						   int idx)
+static void mlx5e_grp_per_prio_traffic_fill_strings(struct mlx5e_priv *priv,
+						    u8 **data)
 {
 	int i, prio;
 
 	for (prio = 0; prio < NUM_PPORT_PRIO; prio++) {
 		for (i = 0; i < NUM_PPORT_PER_PRIO_TRAFFIC_COUNTERS; i++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				pport_per_prio_traffic_stats_desc[i].format, prio);
+			ethtool_sprintf(data,
+					pport_per_prio_traffic_stats_desc[i].format,
+					prio);
 	}
-
-	return idx;
 }
 
 static int mlx5e_grp_per_prio_traffic_fill_stats(struct mlx5e_priv *priv,
@@ -1816,9 +1790,8 @@ static int mlx5e_grp_per_prio_pfc_get_num_stats(struct mlx5e_priv *priv)
 		NUM_PPORT_PFC_STALL_COUNTERS(priv);
 }
 
-static int mlx5e_grp_per_prio_pfc_fill_strings(struct mlx5e_priv *priv,
-					       u8 *data,
-					       int idx)
+static void mlx5e_grp_per_prio_pfc_fill_strings(struct mlx5e_priv *priv,
+						u8 **data)
 {
 	unsigned long pfc_combined;
 	int i, prio;
@@ -1829,23 +1802,22 @@ static int mlx5e_grp_per_prio_pfc_fill_strings(struct mlx5e_priv *priv,
 			char pfc_string[ETH_GSTRING_LEN];
 
 			snprintf(pfc_string, sizeof(pfc_string), "prio%d", prio);
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				pport_per_prio_pfc_stats_desc[i].format, pfc_string);
+			ethtool_sprintf(data,
+					pport_per_prio_pfc_stats_desc[i].format,
+					pfc_string);
 		}
 	}
 
 	if (mlx5e_query_global_pause_combined(priv)) {
 		for (i = 0; i < NUM_PPORT_PER_PRIO_PFC_COUNTERS; i++) {
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				pport_per_prio_pfc_stats_desc[i].format, "global");
+			ethtool_sprintf(data,
+					pport_per_prio_pfc_stats_desc[i].format,
+					"global");
 		}
 	}
 
 	for (i = 0; i < NUM_PPORT_PFC_STALL_COUNTERS(priv); i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN,
-		       pport_pfc_stall_stats_desc[i].format);
-
-	return idx;
+		ethtool_puts(data, pport_pfc_stall_stats_desc[i].format);
 }
 
 static int mlx5e_grp_per_prio_pfc_fill_stats(struct mlx5e_priv *priv,
@@ -1887,9 +1859,8 @@ static MLX5E_DECLARE_STATS_GRP_OP_NUM_STATS(per_prio)
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(per_prio)
 {
-	idx = mlx5e_grp_per_prio_traffic_fill_strings(priv, data, idx);
-	idx = mlx5e_grp_per_prio_pfc_fill_strings(priv, data, idx);
-	return idx;
+	mlx5e_grp_per_prio_traffic_fill_strings(priv, data);
+	mlx5e_grp_per_prio_pfc_fill_strings(priv, data);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(per_prio)
@@ -1944,12 +1915,10 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(pme)
 	int i;
 
 	for (i = 0; i < NUM_PME_STATUS_STATS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN, mlx5e_pme_status_desc[i].format);
+		ethtool_puts(data, mlx5e_pme_status_desc[i].format);
 
 	for (i = 0; i < NUM_PME_ERR_STATS; i++)
-		strcpy(data + (idx++) * ETH_GSTRING_LEN, mlx5e_pme_error_desc[i].format);
-
-	return idx;
+		ethtool_puts(data, mlx5e_pme_error_desc[i].format);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(pme)
@@ -1979,7 +1948,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_NUM_STATS(tls)
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(tls)
 {
-	return idx + mlx5e_ktls_get_strings(priv, data + idx * ETH_GSTRING_LEN);
+	mlx5e_ktls_get_strings(priv, data);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(tls)
@@ -2264,10 +2233,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(qos)
 
 	for (qid = 0; qid < max_qos_sqs; qid++)
 		for (i = 0; i < NUM_QOS_SQ_STATS; i++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				qos_sq_stats_desc[i].format, qid);
-
-	return idx;
+			ethtool_sprintf(data, qos_sq_stats_desc[i].format, qid);
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(qos)
@@ -2312,29 +2278,29 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(ptp)
 	int i, tc;
 
 	if (!priv->tx_ptp_opened && !priv->rx_ptp_opened)
-		return idx;
+		return;
 
 	for (i = 0; i < NUM_PTP_CH_STATS; i++)
-		sprintf(data + (idx++) * ETH_GSTRING_LEN,
-			"%s", ptp_ch_stats_desc[i].format);
+		ethtool_puts(data, ptp_ch_stats_desc[i].format);
 
 	if (priv->tx_ptp_opened) {
 		for (tc = 0; tc < priv->max_opened_tc; tc++)
 			for (i = 0; i < NUM_PTP_SQ_STATS; i++)
-				sprintf(data + (idx++) * ETH_GSTRING_LEN,
-					ptp_sq_stats_desc[i].format, tc);
+				ethtool_sprintf(data,
+						ptp_sq_stats_desc[i].format,
+						tc);
 
 		for (tc = 0; tc < priv->max_opened_tc; tc++)
 			for (i = 0; i < NUM_PTP_CQ_STATS; i++)
-				sprintf(data + (idx++) * ETH_GSTRING_LEN,
-					ptp_cq_stats_desc[i].format, tc);
+				ethtool_sprintf(data,
+						ptp_cq_stats_desc[i].format,
+						tc);
 	}
 	if (priv->rx_ptp_opened) {
 		for (i = 0; i < NUM_PTP_RQ_STATS; i++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				ptp_rq_stats_desc[i].format, MLX5E_PTP_CHANNEL_IX);
+			ethtool_sprintf(data, ptp_rq_stats_desc[i].format,
+					MLX5E_PTP_CHANNEL_IX);
 	}
-	return idx;
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(ptp)
@@ -2394,38 +2360,29 @@ static MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(channels)
 
 	for (i = 0; i < max_nch; i++)
 		for (j = 0; j < NUM_CH_STATS; j++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				ch_stats_desc[j].format, i);
+			ethtool_sprintf(data, ch_stats_desc[j].format, i);
 
 	for (i = 0; i < max_nch; i++) {
 		for (j = 0; j < NUM_RQ_STATS; j++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				rq_stats_desc[j].format, i);
+			ethtool_sprintf(data, rq_stats_desc[j].format, i);
 		for (j = 0; j < NUM_XSKRQ_STATS * is_xsk; j++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				xskrq_stats_desc[j].format, i);
+			ethtool_sprintf(data, xskrq_stats_desc[j].format, i);
 		for (j = 0; j < NUM_RQ_XDPSQ_STATS; j++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				rq_xdpsq_stats_desc[j].format, i);
+			ethtool_sprintf(data, rq_xdpsq_stats_desc[j].format, i);
 	}
 
 	for (tc = 0; tc < priv->max_opened_tc; tc++)
 		for (i = 0; i < max_nch; i++)
 			for (j = 0; j < NUM_SQ_STATS; j++)
-				sprintf(data + (idx++) * ETH_GSTRING_LEN,
-					sq_stats_desc[j].format,
-					i + tc * max_nch);
+				ethtool_sprintf(data, sq_stats_desc[j].format,
+						i + tc * max_nch);
 
 	for (i = 0; i < max_nch; i++) {
 		for (j = 0; j < NUM_XSKSQ_STATS * is_xsk; j++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				xsksq_stats_desc[j].format, i);
+			ethtool_sprintf(data, xsksq_stats_desc[j].format, i);
 		for (j = 0; j < NUM_XDPSQ_STATS; j++)
-			sprintf(data + (idx++) * ETH_GSTRING_LEN,
-				xdpsq_stats_desc[j].format, i);
+			ethtool_sprintf(data, xdpsq_stats_desc[j].format, i);
 	}
-
-	return idx;
 }
 
 static MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(channels)

drivers/net/ethernet/mellanox/mlx5/core/en_stats.h

@@ -71,7 +71,7 @@ struct mlx5e_priv;
 struct mlx5e_stats_grp {
 	u16 update_stats_mask;
 	int (*get_num_stats)(struct mlx5e_priv *priv);
-	int (*fill_strings)(struct mlx5e_priv *priv, u8 *data, int idx);
+	void (*fill_strings)(struct mlx5e_priv *priv, u8 **data);
 	int (*fill_stats)(struct mlx5e_priv *priv, u64 *data, int idx);
 	void (*update_stats)(struct mlx5e_priv *priv);
 };
@@ -87,7 +87,7 @@ typedef const struct mlx5e_stats_grp *const mlx5e_stats_grp_t;
 	void MLX5E_STATS_GRP_OP(grp, update_stats)(struct mlx5e_priv *priv)
 
 #define MLX5E_DECLARE_STATS_GRP_OP_FILL_STRS(grp) \
-	int MLX5E_STATS_GRP_OP(grp, fill_strings)(struct mlx5e_priv *priv, u8 *data, int idx)
+	void MLX5E_STATS_GRP_OP(grp, fill_strings)(struct mlx5e_priv *priv, u8 **data)
 
 #define MLX5E_DECLARE_STATS_GRP_OP_FILL_STATS(grp) \
 	int MLX5E_STATS_GRP_OP(grp, fill_stats)(struct mlx5e_priv *priv, u64 *data, int idx)