patch 'net/hns3: fix divide by zero' has been queued to stable release 22.11.9

[luca.boccassi@gmail.com]

Hi,

FYI, your patch has been queued to stable release 22.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/14/25. 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://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/077396a3d01ceea19bab0085584c9ceb45819fcc

Thanks.

Luca Boccassi

---
From 077396a3d01ceea19bab0085584c9ceb45819fcc Mon Sep 17 00:00:00 2001
From: Dengdui Huang <huangdengdui@huawei.com>
Date: Tue, 8 Apr 2025 16:30:59 +0800
Subject: [PATCH] net/hns3: fix divide by zero

[ 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@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 91d7dc12d2..2c3a992e1a 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2548,6 +2548,10 @@ 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;
@@ -2799,6 +2803,7 @@ 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;
@@ -2817,6 +2822,11 @@ 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;
-- 
2.47.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2025-06-12 22:06:25.081578364 +0100
+++ 0032-net-hns3-fix-divide-by-zero.patch	2025-06-12 22:06:23.854044300 +0100
@@ -1 +1 @@
-From a88f60f32de6f94a5acbf2101cb5e527fac0b2d2 Mon Sep 17 00:00:00 2001
+From 077396a3d01ceea19bab0085584c9ceb45819fcc Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit a88f60f32de6f94a5acbf2101cb5e527fac0b2d2 ]
+
@@ -11 +12,0 @@
-Cc: stable@dpdk.org
@@ -19 +20 @@
-index 2b56b6e44e..2d4e348442 100644
+index 91d7dc12d2..2c3a992e1a 100644
@@ -22 +23 @@
-@@ -2544,6 +2544,10 @@ hns3_query_pf_resource(struct hns3_hw *hw)
+@@ -2548,6 +2548,10 @@ hns3_query_pf_resource(struct hns3_hw *hw)
@@ -33 +34 @@
-@@ -2795,6 +2799,7 @@ hns3_check_media_type(struct hns3_hw *hw, uint8_t media_type)
+@@ -2799,6 +2803,7 @@ hns3_check_media_type(struct hns3_hw *hw, uint8_t media_type)
@@ -41 +42 @@
-@@ -2813,6 +2818,11 @@ hns3_get_board_configuration(struct hns3_hw *hw)
+@@ -2817,6 +2822,11 @@ hns3_get_board_configuration(struct hns3_hw *hw)