patch 'net/hns3: fix reset level comparison' has been queued to stable release 23.11.1

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 23.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/31/24. 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=cb1cef89c47a4d266c9077b39170e4b96ce0784e

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From cb1cef89c47a4d266c9077b39170e4b96ce0784e Mon Sep 17 00:00:00 2001
From: Dengdui Huang <huangdengdui at huawei.com>
Date: Fri, 8 Dec 2023 15:44:16 +0800
Subject: [PATCH] net/hns3: fix reset level comparison
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit 1ceb5ad2dfdcc3e6658119d25253bced5be3cc32 ]

Currently, there are two problems in hns3vf_is_reset_pending():
1. The new detect reset level is not HNS3_NONE_RESET, but the
   last reset level is HNS3_NONE_RESET, this function returns false.
2. Comparison between last_req and new_req is opposite.

In addition, the reset level comparison in hns3_detect_reset_event()
is similar to the hns3vf_is_reset_pending(). So this patch fixes
above the problems and merges the logic of reset level comparison.

Fixes: 5be38fc6c0fc ("net/hns3: fix multiple reset detected log")

Signed-off-by: Dengdui Huang <huangdengdui at huawei.com>
Signed-off-by: Jie Hai <haijie1 at huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index d626bdd5b1..eafcf2c6f6 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -5545,27 +5545,15 @@ is_pf_reset_done(struct hns3_hw *hw)
 static enum hns3_reset_level
 hns3_detect_reset_event(struct hns3_hw *hw)
 {
-	struct hns3_adapter *hns = HNS3_DEV_HW_TO_ADAPTER(hw);
 	enum hns3_reset_level new_req = HNS3_NONE_RESET;
-	enum hns3_reset_level last_req;
 	uint32_t vector0_intr_state;

-	last_req = hns3_get_reset_level(hns, &hw->reset.pending);
 	vector0_intr_state = hns3_read_dev(hw, HNS3_VECTOR0_OTHER_INT_STS_REG);
 	if (BIT(HNS3_VECTOR0_IMPRESET_INT_B) & vector0_intr_state)
 		new_req = HNS3_IMP_RESET;
 	else if (BIT(HNS3_VECTOR0_GLOBALRESET_INT_B) & vector0_intr_state)
 		new_req = HNS3_GLOBAL_RESET;

-	if (new_req == HNS3_NONE_RESET)
-		return HNS3_NONE_RESET;
-
-	if (last_req == HNS3_NONE_RESET || last_req < new_req) {
-		__atomic_store_n(&hw->reset.disable_cmd, 1, __ATOMIC_RELAXED);
-		hns3_schedule_delayed_reset(hns);
-		hns3_warn(hw, "High level reset detected, delay do reset");
-	}
-
 	return new_req;
 }

@@ -5584,10 +5572,14 @@ hns3_is_reset_pending(struct hns3_adapter *hns)
 		return false;

 	new_req = hns3_detect_reset_event(hw);
+	if (new_req == HNS3_NONE_RESET)
+		return false;
+
 	last_req = hns3_get_reset_level(hns, &hw->reset.pending);
-	if (last_req != HNS3_NONE_RESET && new_req != HNS3_NONE_RESET &&
-	    new_req < last_req) {
-		hns3_warn(hw, "High level reset %d is pending", last_req);
+	if (last_req == HNS3_NONE_RESET || last_req < new_req) {
+		__atomic_store_n(&hw->reset.disable_cmd, 1, __ATOMIC_RELAXED);
+		hns3_schedule_delayed_reset(hns);
+		hns3_warn(hw, "High level reset detected, delay do reset");
 		return true;
 	}
 	last_req = hns3_get_reset_level(hns, &hw->reset.request);
--
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-03-05 17:39:33.679629090 +0800
+++ 0088-net-hns3-fix-reset-level-comparison.patch	2024-03-05 17:39:30.843566495 +0800
@@ -1 +1 @@
-From 1ceb5ad2dfdcc3e6658119d25253bced5be3cc32 Mon Sep 17 00:00:00 2001
+From cb1cef89c47a4d266c9077b39170e4b96ce0784e Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit 1ceb5ad2dfdcc3e6658119d25253bced5be3cc32 ]
@@ -16 +18,0 @@
-Cc: stable at dpdk.org