[dpdk-stable] patch 'net/mlx5: fix overflow of Memory Region cache' 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 eda82c93d3c101c5cf94c4fb0a829bb90bf28c3b Mon Sep 17 00:00:00 2001
From: Yongseok Koh <yskoh at mellanox.com>
Date: Thu, 14 Dec 2017 17:59:18 -0800
Subject: [PATCH] net/mlx5: fix overflow of Memory Region cache

[ upstream commit de48f16525e23cd04ee4c1c5b74392123529758a ]

If there're more MR(Memroy Region)'s than the size of per-queue cache, the
cache can be overflowed and corrupt the following data structure in
mlx5_txq_data.

Fixes: 6e78005a9b30 ("net/mlx5: add reference counter on DPDK Tx queues")

Signed-off-by: Yongseok Koh <yskoh at mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>
---
 drivers/net/mlx5/mlx5_trigger.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
index 5de2d02..3540b5d 100644
--- a/drivers/net/mlx5/mlx5_trigger.c
+++ b/drivers/net/mlx5/mlx5_trigger.c
@@ -64,8 +64,11 @@ priv_txq_start(struct priv *priv)
 
 		if (!txq_ctrl)
 			continue;
-		LIST_FOREACH(mr, &priv->mr, next)
+		LIST_FOREACH(mr, &priv->mr, next) {
 			priv_txq_mp2mr_reg(priv, &txq_ctrl->txq, mr->mp, idx++);
+			if (idx == MLX5_PMD_TX_MP_CACHE)
+				break;
+		}
 		txq_alloc_elts(txq_ctrl);
 		txq_ctrl->ibv = mlx5_priv_txq_ibv_new(priv, i);
 		if (!txq_ctrl->ibv) {
-- 
2.7.4