patch 'net/hns3: fix divide by zero' has been queued to stable release 23.11.5

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 23.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/28/25. 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=23.11-staging

This queued commit can be viewed at:
https://git.dpdk.org/dpdk-stable/commit/?h=23.11-staging&id=307bf0ec7685be9f7007450a427472f000848261

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 307bf0ec7685be9f7007450a427472f000848261 Mon Sep 17 00:00:00 2001
From: Dengdui Huang <huangdengdui at huawei.com>
Date: Tue, 8 Apr 2025 16:30:59 +0800
Subject: [PATCH] net/hns3: fix divide by zero
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit a88f60f32de6f94a5acbf2101cb5e527fac0b2d2 ]

Driver may encounter divide-by-zero if the total_tqps_num
and rss_size_max in hw structure from firmware are zero.
So add some verification to them.

Fixes: d51867db65c1 ("net/hns3: add initialization")

Signed-off-by: Dengdui Huang <huangdengdui at huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 5fa288bf2f..541f086443 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2544,6 +2544,10 @@ hns3_query_pf_resource(struct hns3_hw *hw)
 	req = (struct hns3_pf_res_cmd *)desc.data;
 	hw->total_tqps_num = rte_le_to_cpu_16(req->tqp_num) +
 			     rte_le_to_cpu_16(req->ext_tqp_num);
+	if (hw->total_tqps_num == 0) {
+		PMD_INIT_LOG(ERR, "the total tqp number of the port is 0.");
+		return -EINVAL;
+	}
 	ret = hns3_get_pf_max_tqp_num(hw);
 	if (ret)
 		return ret;
@@ -2795,6 +2799,7 @@ hns3_check_media_type(struct hns3_hw *hw, uint8_t media_type)
 static int
 hns3_get_board_configuration(struct hns3_hw *hw)
 {
+#define HNS3_RSS_SIZE_MAX_DEFAULT	64
 	struct hns3_adapter *hns = HNS3_DEV_HW_TO_ADAPTER(hw);
 	struct hns3_pf *pf = &hns->pf;
 	struct hns3_cfg cfg;
@@ -2813,6 +2818,11 @@ hns3_get_board_configuration(struct hns3_hw *hw)
 
 	hw->mac.media_type = cfg.media_type;
 	hw->rss_size_max = cfg.rss_size_max;
+	if (hw->rss_size_max == 0) {
+		PMD_INIT_LOG(WARNING, "rss_size_max is 0, already adjust to %u.",
+			     HNS3_RSS_SIZE_MAX_DEFAULT);
+		hw->rss_size_max = HNS3_RSS_SIZE_MAX_DEFAULT;
+	}
 	memcpy(hw->mac.mac_addr, cfg.mac_addr, RTE_ETHER_ADDR_LEN);
 	hw->mac.phy_addr = cfg.phy_addr;
 	hw->dcb_info.num_pg = 1;
-- 
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2025-06-26 19:59:19.409427860 +0800
+++ 0039-net-hns3-fix-divide-by-zero.patch	2025-06-26 19:59:17.366418045 +0800
@@ -1 +1 @@
-From a88f60f32de6f94a5acbf2101cb5e527fac0b2d2 Mon Sep 17 00:00:00 2001
+From 307bf0ec7685be9f7007450a427472f000848261 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit a88f60f32de6f94a5acbf2101cb5e527fac0b2d2 ]
@@ -11 +13,0 @@
-Cc: stable at dpdk.org
@@ -19 +21 @@
-index 2b56b6e44e..2d4e348442 100644
+index 5fa288bf2f..541f086443 100644