[dpdk-stable] patch 'net/mlx5: cleanup allocation of ethtool stats' has been queued to LTS release 17.11.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to LTS release 17.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/26/18. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From c6a459eb512872e357fb3ad82f4e02b06d75a6c5 Mon Sep 17 00:00:00 2001
From: Thierry Herbelot <thierry.herbelot at 6wind.com>
Date: Fri, 17 Nov 2017 14:51:34 +0100
Subject: [PATCH] net/mlx5: cleanup allocation of ethtool stats

[ upstream commit 25b73ba6f3ea0894bf3cfc64e999f71a7e4f6787 ]

Simplify the computation for the needed size:
- exact size for the structure header,
- exact size for a number of 64-bit counters.

Fixes: a4193ae3bc4f ("net/mlx5: support extended statistics")

Signed-off-by: Thierry Herbelot <thierry.herbelot at 6wind.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>
---
 drivers/net/mlx5/mlx5_stats.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_stats.c b/drivers/net/mlx5/mlx5_stats.c
index 5e225d3..2427585 100644
--- a/drivers/net/mlx5/mlx5_stats.c
+++ b/drivers/net/mlx5/mlx5_stats.c
@@ -143,11 +143,9 @@ priv_read_dev_counters(struct priv *priv, uint64_t *stats)
 	struct mlx5_xstats_ctrl *xstats_ctrl = &priv->xstats_ctrl;
 	unsigned int i;
 	struct ifreq ifr;
-	unsigned int stats_sz = (xstats_ctrl->stats_n * sizeof(uint64_t)) +
-				 sizeof(struct ethtool_stats);
-	struct ethtool_stats et_stats[(stats_sz + (
-				      sizeof(struct ethtool_stats) - 1)) /
-				      sizeof(struct ethtool_stats)];
+	unsigned int stats_sz = xstats_ctrl->stats_n * sizeof(uint64_t);
+	unsigned char et_stat_buf[sizeof(struct ethtool_stats) + stats_sz];
+	struct ethtool_stats *et_stats = (struct ethtool_stats *)et_stat_buf;
 
 	et_stats->cmd = ETHTOOL_GSTATS;
 	et_stats->n_stats = xstats_ctrl->stats_n;
-- 
2.7.4