[dpdk-dev] [PATCH 1/4] net/bnxt: fix extended port counter statistics

[Somnath Kotur <somnath.kotur@broadcom.com>]

From: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>

We were trying to fill in more rx extended stats than the size allocated
for stats causing segfault. Fixed this by adding an explicit check.
Rearranged the code to return statistic values in xstats_get as per the
names returned in xstats_get_names.

Fixes: f55e12f33416 ("net/bnxt: support extended port counters")

Signed-off-by: Rahul Gupta <rahul.gupta@broadcom.com>
Signed-off-by: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
---
 drivers/net/bnxt/bnxt_stats.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_stats.c b/drivers/net/bnxt/bnxt_stats.c
index 4e74f8a..69ac2dd 100644
--- a/drivers/net/bnxt/bnxt_stats.c
+++ b/drivers/net/bnxt/bnxt_stats.c
@@ -427,8 +427,12 @@ int bnxt_dev_xstats_get_op(struct rte_eth_dev *eth_dev,
 	bnxt_hwrm_port_qstats(bp);
 	bnxt_hwrm_func_qstats_tx_drop(bp, 0xffff, &tx_drop_pkts);
 	bnxt_hwrm_ext_port_qstats(bp);
-	rx_port_stats_ext_cnt = bp->fw_rx_port_stats_ext_size / stat_size;
-	tx_port_stats_ext_cnt = bp->fw_tx_port_stats_ext_size / stat_size;
+	rx_port_stats_ext_cnt = RTE_MIN(RTE_DIM(bnxt_rx_ext_stats_strings),
+					(bp->fw_rx_port_stats_ext_size /
+					 stat_size));
+	tx_port_stats_ext_cnt = RTE_MIN(RTE_DIM(bnxt_tx_ext_stats_strings),
+					(bp->fw_tx_port_stats_ext_size /
+					 stat_size));
 
 	count = RTE_DIM(bnxt_rx_stats_strings) +
 		RTE_DIM(bnxt_tx_stats_strings) + 1/* For tx_drop_pkts */ +
@@ -463,22 +467,22 @@ int bnxt_dev_xstats_get_op(struct rte_eth_dev *eth_dev,
 	xstats[count].value = rte_le_to_cpu_64(tx_drop_pkts);
 	count++;
 
-	for (i = 0; i < tx_port_stats_ext_cnt; i++) {
-		uint64_t *tx_stats_ext = (uint64_t *)bp->hw_tx_port_stats_ext;
+	for (i = 0; i < rx_port_stats_ext_cnt; i++) {
+		uint64_t *rx_stats_ext = (uint64_t *)bp->hw_rx_port_stats_ext;
 
 		xstats[count].value = rte_le_to_cpu_64
-					(*(uint64_t *)((char *)tx_stats_ext +
-					 bnxt_tx_ext_stats_strings[i].offset));
+					(*(uint64_t *)((char *)rx_stats_ext +
+					 bnxt_rx_ext_stats_strings[i].offset));
 
 		count++;
 	}
 
-	for (i = 0; i < rx_port_stats_ext_cnt; i++) {
-		uint64_t *rx_stats_ext = (uint64_t *)bp->hw_rx_port_stats_ext;
+	for (i = 0; i < tx_port_stats_ext_cnt; i++) {
+		uint64_t *tx_stats_ext = (uint64_t *)bp->hw_tx_port_stats_ext;
 
 		xstats[count].value = rte_le_to_cpu_64
-					(*(uint64_t *)((char *)rx_stats_ext +
-					 bnxt_rx_ext_stats_strings[i].offset));
+					(*(uint64_t *)((char *)tx_stats_ext +
+					 bnxt_tx_ext_stats_strings[i].offset));
 
 		count++;
 	}
-- 
1.8.3.1