patch 'net/hns3: fix possible truncation of redirection table' 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/4eb35e5bd4c23765a893cc0e0bee770fd6bf2063

Thanks.

Luca Boccassi

---
>From 4eb35e5bd4c23765a893cc0e0bee770fd6bf2063 Mon Sep 17 00:00:00 2001
From: Huisong Li <lihuisong at huawei.com>
Date: Fri, 10 Mar 2023 17:35:04 +0800
Subject: [PATCH] net/hns3: fix possible truncation of redirection table

[ upstream commit 4729376e555b58a739e6e231d403ca3b029ad92c ]

The size of the redirection table is obtained from firmware. If the size
isn't a multiple of HNS3_RSS_CFG_TBL_SIZE, the redirection table from
user will be truncated.

Fixes: c37ca66f2b27 ("net/hns3: support RSS")

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3 at huawei.com>
---
 drivers/net/hns3/hns3_rss.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/net/hns3/hns3_rss.c b/drivers/net/hns3/hns3_rss.c
index 6478150f7b..4926189588 100644
--- a/drivers/net/hns3/hns3_rss.c
+++ b/drivers/net/hns3/hns3_rss.c
@@ -329,6 +329,7 @@ int
 hns3_set_rss_indir_table(struct hns3_hw *hw, uint16_t *indir, uint16_t size)
 {
 	struct hns3_rss_indirection_table_cmd *req;
+	uint16_t max_bd_num, cfg_tbl_size;
 	struct hns3_cmd_desc desc;
 	uint8_t qid_msb_off;
 	uint8_t qid_msb_val;
@@ -337,14 +338,20 @@ hns3_set_rss_indir_table(struct hns3_hw *hw, uint16_t *indir, uint16_t size)
 	int ret;
 
 	req = (struct hns3_rss_indirection_table_cmd *)desc.data;
-
-	for (i = 0; i < size / HNS3_RSS_CFG_TBL_SIZE; i++) {
+	max_bd_num = DIV_ROUND_UP(size, HNS3_RSS_CFG_TBL_SIZE);
+	for (i = 0; i < max_bd_num; i++) {
 		hns3_cmd_setup_basic_desc(&desc, HNS3_OPC_RSS_INDIR_TABLE,
 					  false);
 		req->start_table_index =
 				rte_cpu_to_le_16(i * HNS3_RSS_CFG_TBL_SIZE);
 		req->rss_set_bitmap = rte_cpu_to_le_16(HNS3_RSS_SET_BITMAP_MSK);
-		for (j = 0; j < HNS3_RSS_CFG_TBL_SIZE; j++) {
+
+		if (i == max_bd_num - 1 && (size % HNS3_RSS_CFG_TBL_SIZE) != 0)
+			cfg_tbl_size = size % HNS3_RSS_CFG_TBL_SIZE;
+		else
+			cfg_tbl_size = HNS3_RSS_CFG_TBL_SIZE;
+
+		for (j = 0; j < cfg_tbl_size; j++) {
 			q_id = indir[i * HNS3_RSS_CFG_TBL_SIZE + j];
 			req->rss_result_l[j] = q_id & 0xff;
 
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-03-15 22:44:51.081610436 +0000
+++ 0025-net-hns3-fix-possible-truncation-of-redirection-tabl.patch	2023-03-15 22:44:49.619851015 +0000
@@ -1 +1 @@
-From 4729376e555b58a739e6e231d403ca3b029ad92c Mon Sep 17 00:00:00 2001
+From 4eb35e5bd4c23765a893cc0e0bee770fd6bf2063 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 4729376e555b58a739e6e231d403ca3b029ad92c ]
+
@@ -11 +12,0 @@
-Cc: stable at dpdk.org
@@ -20 +21 @@
-index 2011c18b9b..ed397587b5 100644
+index 6478150f7b..4926189588 100644