patch 'regex/mlx5: fix doorbell record' has been queued to stable release 21.11.4

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 21.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/20/23. 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/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/5b765d83bba06bd887d263d077bc7cdb5b7b56e1

Thanks.

Kevin

---
>From 5b765d83bba06bd887d263d077bc7cdb5b7b56e1 Mon Sep 17 00:00:00 2001
From: Gerry Gribbon <ggribbon at nvidia.com>
Date: Tue, 21 Feb 2023 07:49:57 +0000
Subject: [PATCH] regex/mlx5: fix doorbell record

[ upstream commit b15d75b2872efce397d827dac78692a919358302 ]

We were writing a value that should represent the number of items to be
processed by hardware. The value being written was off by 1 (N*4)+3;
The value should be (N*4) + 4 simplified to (N+1)*4

Fixes: 5dfa003db53f ("common/mlx5: fix post doorbell barrier")

Signed-off-by: Gerry Gribbon <ggribbon at nvidia.com>
---
 drivers/regex/mlx5/mlx5_regex_fastpath.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/regex/mlx5/mlx5_regex_fastpath.c b/drivers/regex/mlx5/mlx5_regex_fastpath.c
index 4edd56d045..32a9181fb3 100644
--- a/drivers/regex/mlx5/mlx5_regex_fastpath.c
+++ b/drivers/regex/mlx5/mlx5_regex_fastpath.c
@@ -175,6 +175,6 @@ send_doorbell(struct mlx5_regex_priv *priv, struct mlx5_regex_hw_qp *qp)
 			    (priv->has_umr ? MLX5_REGEX_UMR_WQE_SIZE : 0);
 	uint8_t *wqe = (uint8_t *)(uintptr_t)qp->qp_obj.wqes + wqe_offset;
-	uint32_t actual_pi = (priv->has_umr ? (qp->db_pi * 4 + 3) : qp->db_pi) &
-			     MLX5_REGEX_MAX_WQE_INDEX;
+	uint32_t actual_pi = (priv->has_umr ? ((1 + qp->db_pi) * 4) : qp->db_pi)
+			     & MLX5_REGEX_MAX_WQE_INDEX;
 
 	/* Or the fm_ce_se instead of set, avoid the fence be cleared. */
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-03-15 14:30:21.395151464 +0000
+++ 0033-regex-mlx5-fix-doorbell-record.patch	2023-03-15 14:30:20.598123745 +0000
@@ -1 +1 @@
-From b15d75b2872efce397d827dac78692a919358302 Mon Sep 17 00:00:00 2001
+From 5b765d83bba06bd887d263d077bc7cdb5b7b56e1 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit b15d75b2872efce397d827dac78692a919358302 ]
+
@@ -11 +12,0 @@
-Cc: stable at dpdk.org
@@ -19 +20 @@
-index 6c87afa923..8e5f8c9c95 100644
+index 4edd56d045..32a9181fb3 100644
@@ -22 +23 @@
-@@ -212,6 +212,6 @@ send_doorbell(struct mlx5_regex_priv *priv, struct mlx5_regex_hw_qp *qp)
+@@ -175,6 +175,6 @@ send_doorbell(struct mlx5_regex_priv *priv, struct mlx5_regex_hw_qp *qp)