patch 'net/hns3: fix possible truncation of hash key when config' has been queued to stable release 20.11.8

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.8

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/17/23. 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/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/add16de717b4b9df71d3d554dab231179a234e2d

Thanks.

Luca Boccassi

---
>From add16de717b4b9df71d3d554dab231179a234e2d Mon Sep 17 00:00:00 2001
From: Huisong Li <lihuisong at huawei.com>
Date: Fri, 10 Mar 2023 17:35:03 +0800
Subject: [PATCH] net/hns3: fix possible truncation of hash key when config

[ upstream commit bb38316e738ad6009b3f20b3abfaf27ea8cb0202 ]

The hash key length of hns3 driver is obtained from firmware. If the
length is a multiple of HNS3_RSS_HASH_KEY_NUM (16), the last part
of hash key will be truncated.

Fixes: 88347111eb53 ("net/hns3: refactor set RSS hash algorithm and key interface")

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3 at huawei.com>
---
 drivers/net/hns3/hns3_rss.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/hns3/hns3_rss.c b/drivers/net/hns3/hns3_rss.c
index c38e12f79d..6478150f7b 100644
--- a/drivers/net/hns3/hns3_rss.c
+++ b/drivers/net/hns3/hns3_rss.c
@@ -301,7 +301,8 @@ hns3_set_rss_algo_key(struct hns3_hw *hw, uint8_t hash_algo,
 		req->hash_config |= (hash_algo & HNS3_RSS_HASH_ALGO_MASK);
 		req->hash_config |= (idx << HNS3_RSS_HASH_KEY_OFFSET_B);
 
-		if (idx == max_bd_num - 1)
+		if (idx == max_bd_num - 1 &&
+		    (key_len % HNS3_RSS_HASH_KEY_NUM) != 0)
 			cur_key_size = key_len % HNS3_RSS_HASH_KEY_NUM;
 		else
 			cur_key_size = HNS3_RSS_HASH_KEY_NUM;
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-03-15 22:44:51.020029637 +0000
+++ 0024-net-hns3-fix-possible-truncation-of-hash-key-when-co.patch	2023-03-15 22:44:49.615850932 +0000
@@ -1 +1 @@
-From bb38316e738ad6009b3f20b3abfaf27ea8cb0202 Mon Sep 17 00:00:00 2001
+From add16de717b4b9df71d3d554dab231179a234e2d Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit bb38316e738ad6009b3f20b3abfaf27ea8cb0202 ]
+
@@ -11 +12,0 @@
-Cc: stable at dpdk.org
@@ -20 +21 @@
-index d6e0754273..2011c18b9b 100644
+index c38e12f79d..6478150f7b 100644
@@ -23 +24 @@
-@@ -301,7 +301,8 @@ hns3_rss_set_algo_key(struct hns3_hw *hw, uint8_t hash_algo,
+@@ -301,7 +301,8 @@ hns3_set_rss_algo_key(struct hns3_hw *hw, uint8_t hash_algo,