[PATCHv2 net-next] net: bnxt: use ethtool string helpers

[Rosen Penev <rosenp@gmail.com>]

Avoids having to use manual pointer manipulation.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 v2: use extra variable to avoid line length issues
 .../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 115 ++++++++----------
 1 file changed, 54 insertions(+), 61 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index f71cc8188b4e..90c870c82398 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -705,112 +705,105 @@ static void bnxt_get_ethtool_stats(struct net_device *dev,
 static void bnxt_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
 {
 	struct bnxt *bp = netdev_priv(dev);
-	static const char * const *str;
+	const char *str;
 	u32 i, j, num_str;
 
 	switch (stringset) {
 	case ETH_SS_STATS:
 		for (i = 0; i < bp->cp_nr_rings; i++) {
-			if (is_rx_ring(bp, i)) {
-				num_str = NUM_RING_RX_HW_STATS;
-				for (j = 0; j < num_str; j++) {
-					sprintf(buf, "[%d]: %s", i,
-						bnxt_ring_rx_stats_str[j]);
-					buf += ETH_GSTRING_LEN;
+			if (is_rx_ring(bp, i))
+				for (j = 0; j < NUM_RING_RX_HW_STATS; j++) {
+					str = bnxt_ring_rx_stats_str[j];
+					ethtool_sprintf(&buf, "[%d]: %s", i,
+							str);
 				}
-			}
-			if (is_tx_ring(bp, i)) {
-				num_str = NUM_RING_TX_HW_STATS;
-				for (j = 0; j < num_str; j++) {
-					sprintf(buf, "[%d]: %s", i,
-						bnxt_ring_tx_stats_str[j]);
-					buf += ETH_GSTRING_LEN;
+			if (is_tx_ring(bp, i))
+				for (j = 0; j < NUM_RING_TX_HW_STATS; j++) {
+					str = bnxt_ring_tx_stats_str[j];
+					ethtool_sprintf(&buf, "[%d]: %s", i,
+							str);
 				}
-			}
 			num_str = bnxt_get_num_tpa_ring_stats(bp);
 			if (!num_str || !is_rx_ring(bp, i))
 				goto skip_tpa_stats;
 
 			if (bp->max_tpa_v2)
-				str = bnxt_ring_tpa2_stats_str;
+				for (j = 0; j < num_str; j++) {
+					str = bnxt_ring_tpa2_stats_str[j];
+					ethtool_sprintf(&buf, "[%d]: %s", i,
+							str);
+				}
 			else
-				str = bnxt_ring_tpa_stats_str;
-
-			for (j = 0; j < num_str; j++) {
-				sprintf(buf, "[%d]: %s", i, str[j]);
-				buf += ETH_GSTRING_LEN;
-			}
-skip_tpa_stats:
-			if (is_rx_ring(bp, i)) {
-				num_str = NUM_RING_RX_SW_STATS;
 				for (j = 0; j < num_str; j++) {
-					sprintf(buf, "[%d]: %s", i,
-						bnxt_rx_sw_stats_str[j]);
-					buf += ETH_GSTRING_LEN;
+					str = bnxt_ring_tpa_stats_str[j];
+					ethtool_sprintf(&buf, "[%d]: %s", i,
+							str);
 				}
+skip_tpa_stats:
+			if (is_rx_ring(bp, i))
+				for (j = 0; j < NUM_RING_RX_SW_STATS; j++) {
+					str = bnxt_rx_sw_stats_str[j];
+					ethtool_sprintf(&buf, "[%d]: %s", i,
+							str);
+				}
+			for (j = 0; j < NUM_RING_CMN_SW_STATS; j++) {
+				str = bnxt_cmn_sw_stats_str[j];
+				ethtool_sprintf(&buf, "[%d]: %s", i, str);
 			}
-			num_str = NUM_RING_CMN_SW_STATS;
-			for (j = 0; j < num_str; j++) {
-				sprintf(buf, "[%d]: %s", i,
-					bnxt_cmn_sw_stats_str[j]);
-				buf += ETH_GSTRING_LEN;
-			}
-		}
-		for (i = 0; i < BNXT_NUM_RING_ERR_STATS; i++) {
-			strscpy(buf, bnxt_ring_err_stats_arr[i], ETH_GSTRING_LEN);
-			buf += ETH_GSTRING_LEN;
 		}
+		for (i = 0; i < BNXT_NUM_RING_ERR_STATS; i++)
+			ethtool_puts(&buf, bnxt_ring_err_stats_arr[i]);
 
-		if (bp->flags & BNXT_FLAG_PORT_STATS) {
+		if (bp->flags & BNXT_FLAG_PORT_STATS)
 			for (i = 0; i < BNXT_NUM_PORT_STATS; i++) {
-				strcpy(buf, bnxt_port_stats_arr[i].string);
-				buf += ETH_GSTRING_LEN;
+				str = bnxt_port_stats_arr[i].string;
+				ethtool_puts(&buf, str);
 			}
-		}
+
 		if (bp->flags & BNXT_FLAG_PORT_STATS_EXT) {
 			u32 len;
 
 			len = min_t(u32, bp->fw_rx_stats_ext_size,
 				    ARRAY_SIZE(bnxt_port_stats_ext_arr));
 			for (i = 0; i < len; i++) {
-				strcpy(buf, bnxt_port_stats_ext_arr[i].string);
-				buf += ETH_GSTRING_LEN;
+				str = bnxt_port_stats_ext_arr[i].string;
+				ethtool_puts(&buf, str);
 			}
+
 			len = min_t(u32, bp->fw_tx_stats_ext_size,
 				    ARRAY_SIZE(bnxt_tx_port_stats_ext_arr));
 			for (i = 0; i < len; i++) {
-				strcpy(buf,
-				       bnxt_tx_port_stats_ext_arr[i].string);
-				buf += ETH_GSTRING_LEN;
+				str = bnxt_tx_port_stats_ext_arr[i].string;
+				ethtool_puts(&buf, str);
 			}
+
 			if (bp->pri2cos_valid) {
 				for (i = 0; i < 8; i++) {
-					strcpy(buf,
-					       bnxt_rx_bytes_pri_arr[i].string);
-					buf += ETH_GSTRING_LEN;
+					str = bnxt_rx_bytes_pri_arr[i].string;
+					ethtool_puts(&buf, str);
 				}
+
 				for (i = 0; i < 8; i++) {
-					strcpy(buf,
-					       bnxt_rx_pkts_pri_arr[i].string);
-					buf += ETH_GSTRING_LEN;
+					str = bnxt_rx_pkts_pri_arr[i].string;
+					ethtool_puts(&buf, str);
 				}
+
 				for (i = 0; i < 8; i++) {
-					strcpy(buf,
-					       bnxt_tx_bytes_pri_arr[i].string);
-					buf += ETH_GSTRING_LEN;
+					str = bnxt_tx_bytes_pri_arr[i].string;
+					ethtool_puts(&buf, str);
 				}
+
 				for (i = 0; i < 8; i++) {
-					strcpy(buf,
-					       bnxt_tx_pkts_pri_arr[i].string);
-					buf += ETH_GSTRING_LEN;
+					str = bnxt_tx_pkts_pri_arr[i].string;
+					ethtool_puts(&buf, str);
 				}
 			}
 		}
 		break;
 	case ETH_SS_TEST:
 		if (bp->num_tests)
-			memcpy(buf, bp->test_info->string,
-			       bp->num_tests * ETH_GSTRING_LEN);
+			for (i = 0; i < bp->num_tests; i++)
+				ethtool_puts(&buf, bp->test_info->string[i]);
 		break;
 	default:
 		netdev_err(bp->dev, "bnxt_get_strings invalid request %x\n",
-- 
2.47.0