patch 'net/hns3: fix possible truncation of hash key when config' has been queued to stable release 22.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 22.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 04/11/23. 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://git.dpdk.org/dpdk-stable/log/?h=22.11-staging

This queued commit can be viewed at:
https://git.dpdk.org/dpdk-stable/log/?h=22.11-staging/commit/81fbc0298c062e88ba596d12cd77f6748967ff47

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 81fbc0298c062e88ba596d12cd77f6748967ff47 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
Cc: Xueming Li <xuemingl at nvidia.com>

[ 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 d6e0754273..2011c18b9b 100644
--- a/drivers/net/hns3/hns3_rss.c
+++ b/drivers/net/hns3/hns3_rss.c
@@ -301,7 +301,8 @@ hns3_rss_set_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;
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-04-09 21:45:40.618902300 +0800
+++ 0072-net-hns3-fix-possible-truncation-of-hash-key-when-co.patch	2023-04-09 21:45:38.689042200 +0800
@@ -1 +1 @@
-From bb38316e738ad6009b3f20b3abfaf27ea8cb0202 Mon Sep 17 00:00:00 2001
+From 81fbc0298c062e88ba596d12cd77f6748967ff47 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit bb38316e738ad6009b3f20b3abfaf27ea8cb0202 ]
@@ -11 +13,0 @@
-Cc: stable at dpdk.org