[dpdk-stable] patch 'net/hns3: fix flow counter value' has been queued to stable release 20.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/12/21. 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/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/bb24098f63cf85382dcd330468458060084a11c5

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From bb24098f63cf85382dcd330468458060084a11c5 Mon Sep 17 00:00:00 2001
From: Chengwen Feng <fengchengwen at huawei.com>
Date: Wed, 31 Mar 2021 18:01:40 +0800
Subject: [PATCH] net/hns3: fix flow counter value
Cc: Luca Boccassi <bluca at debian.org>

[ upstream commit a06c3b0e9f0a4807ee8ac145f58284ec49f2f33d ]

User could create flow rules with specified counter by the action of
RTE_FLOW_ACTION_TYPE_COUNT, but the counter may retain the original
value when create.

This patch fix the bug by read the counter when creating the rule
because the counter is read-clear.

Fixes: fcba820d9b9e ("net/hns3: support flow director")

Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
---
 drivers/net/hns3/hns3_flow.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/hns3/hns3_flow.c b/drivers/net/hns3/hns3_flow.c
index af0aa72482..ba77defb08 100644
--- a/drivers/net/hns3/hns3_flow.c
+++ b/drivers/net/hns3/hns3_flow.c
@@ -158,7 +158,10 @@ hns3_counter_new(struct rte_eth_dev *dev, uint32_t shared, uint32_t id,
 {
 	struct hns3_adapter *hns = dev->data->dev_private;
 	struct hns3_pf *pf = &hns->pf;
+	struct hns3_hw *hw = &hns->hw;
 	struct hns3_flow_counter *cnt;
+	uint64_t value;
+	int ret;
 
 	cnt = hns3_counter_lookup(dev, id);
 	if (cnt) {
@@ -171,6 +174,13 @@ hns3_counter_new(struct rte_eth_dev *dev, uint32_t shared, uint32_t id,
 		return 0;
 	}
 
+	/* Clear the counter by read ops because the counter is read-clear */
+	ret = hns3_get_count(hw, id, &value);
+	if (ret)
+		return rte_flow_error_set(error, EIO,
+					  RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
+					  "Clear counter failed!");
+
 	cnt = rte_zmalloc("hns3 counter", sizeof(*cnt), 0);
 	if (cnt == NULL)
 		return rte_flow_error_set(error, ENOMEM,
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-05-10 23:59:30.715474700 +0800
+++ 0159-net-hns3-fix-flow-counter-value.patch	2021-05-10 23:59:26.610000000 +0800
@@ -1 +1 @@
-From a06c3b0e9f0a4807ee8ac145f58284ec49f2f33d Mon Sep 17 00:00:00 2001
+From bb24098f63cf85382dcd330468458060084a11c5 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Luca Boccassi <bluca at debian.org>
+
+[ upstream commit a06c3b0e9f0a4807ee8ac145f58284ec49f2f33d ]
@@ -14 +16,0 @@
-Cc: stable at dpdk.org
@@ -23 +25 @@
-index 711eed3f54..098b191909 100644
+index af0aa72482..ba77defb08 100644