patch 'net/mlx5: fix indexed pool fetch overlap' has been queued to stable release 21.11.1

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 21.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/14/22. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/fc4aef6adefeb92cb0ef4ca0aca5f9b2b6333763

Thanks.

Kevin

---
>From fc4aef6adefeb92cb0ef4ca0aca5f9b2b6333763 Mon Sep 17 00:00:00 2001
From: Suanming Mou <suanmingm at nvidia.com>
Date: Wed, 23 Feb 2022 08:26:11 +0200
Subject: [PATCH] net/mlx5: fix indexed pool fetch overlap

[ upstream commit 7bc528bac95a00e2462ae76b1f9e8610d4d67477 ]

For indexed pool with local cache, when a new trunk is allocated,
half of the trunk's index was fetched to the local cache. In case
of local cache size was less then half of the trunk size, memory
overlap happened.

This commit adds the check of the fetch size, if local cache size
is less than fetch size, adjust the fetch size to be local cache
size.

Fixes: d15c0946beea ("net/mlx5: add indexed pool local cache")

Signed-off-by: Suanming Mou <suanmingm at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
---
 drivers/net/mlx5/mlx5_utils.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_utils.c b/drivers/net/mlx5/mlx5_utils.c
index be33af96fe..4115a2ad77 100644
--- a/drivers/net/mlx5/mlx5_utils.c
+++ b/drivers/net/mlx5/mlx5_utils.c
@@ -341,4 +341,6 @@ check_again:
 	ts_idx = mlx5_trunk_idx_offset_get(pool, trunk_idx) + 1;
 	fetch_size = trunk->free >> 1;
+	if (fetch_size > pool->cfg.per_core_cache)
+		fetch_size = trunk->free - pool->cfg.per_core_cache;
 	for (i = 0; i < fetch_size; i++)
 		lc->idx[i] = ts_idx + i;
-- 
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-03-08 13:55:28.856463933 +0000
+++ 0017-net-mlx5-fix-indexed-pool-fetch-overlap.patch	2022-03-08 13:55:28.414314937 +0000
@@ -1 +1 @@
-From 7bc528bac95a00e2462ae76b1f9e8610d4d67477 Mon Sep 17 00:00:00 2001
+From fc4aef6adefeb92cb0ef4ca0aca5f9b2b6333763 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 7bc528bac95a00e2462ae76b1f9e8610d4d67477 ]
+
@@ -16 +17,0 @@
-Cc: stable at dpdk.org