[dpdk-stable] patch 'net/mlx5: fix Tx stats error counter definition' has been queued to stable release 17.08.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 17.08.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/24/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From c598434e626b9511491191c5210f98ad2f3b0f1a Mon Sep 17 00:00:00 2001
From: Shahaf Shuler <shahafs at mellanox.com>
Date: Thu, 14 Sep 2017 13:50:37 +0300
Subject: [PATCH] net/mlx5: fix Tx stats error counter definition

[ upstream commit 9f9a48eb2978157954242e08acf81d7a26f38810 ]

The current Tx error counter counts, according to its description,
the total number of packets not sent when TX ring full. It is reported
to application as part of oerrors field.

The drop due to full ring is not the statistic that should be set on
oerrors field. Such number can be counted by the application using the
return value of the Tx burst function.
The number that should be set there is the number of packets the device
could not transmit in any way, even when it has resources.

Therefore, replace this counter to count the total number of failed
transmitted packets.

Fixes: 87011737b715 ("mlx5: add software counters")

Signed-off-by: Shahaf Shuler <shahafs at mellanox.com>
Acked-by: Yongseok Koh <yskoh at mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>
---
 drivers/net/mlx5/mlx5_rxtx.h  | 2 +-
 drivers/net/mlx5/mlx5_stats.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
index 7de1d10..0d65748 100644
--- a/drivers/net/mlx5/mlx5_rxtx.h
+++ b/drivers/net/mlx5/mlx5_rxtx.h
@@ -81,7 +81,7 @@ struct mlx5_txq_stats {
 	uint64_t opackets; /**< Total of successfully sent packets. */
 	uint64_t obytes; /**< Total of successfully sent bytes. */
 #endif
-	uint64_t odropped; /**< Total of packets not sent when TX ring full. */
+	uint64_t oerrors; /**< Total number of failed transmitted packets. */
 };
 
 /* Flow director queue structure. */
diff --git a/drivers/net/mlx5/mlx5_stats.c b/drivers/net/mlx5/mlx5_stats.c
index 33997af..671c5d0 100644
--- a/drivers/net/mlx5/mlx5_stats.c
+++ b/drivers/net/mlx5/mlx5_stats.c
@@ -367,13 +367,13 @@ mlx5_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 			tmp.q_opackets[idx] += txq->stats.opackets;
 			tmp.q_obytes[idx] += txq->stats.obytes;
 #endif
-			tmp.q_errors[idx] += txq->stats.odropped;
+			tmp.q_errors[idx] += txq->stats.oerrors;
 		}
 #ifdef MLX5_PMD_SOFT_COUNTERS
 		tmp.opackets += txq->stats.opackets;
 		tmp.obytes += txq->stats.obytes;
 #endif
-		tmp.oerrors += txq->stats.odropped;
+		tmp.oerrors += txq->stats.oerrors;
 	}
 #ifndef MLX5_PMD_SOFT_COUNTERS
 	/* FIXME: retrieve and add hardware counters. */
-- 
2.7.4