patch 'raw/ntb: clear all valid doorbell bits on init' has been queued to stable release 21.11.1

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 21.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/26/22. 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/13ddcf9dee6d72e6b61529c8254a717a01e086bb

Thanks.

Kevin

---
>From 13ddcf9dee6d72e6b61529c8254a717a01e086bb Mon Sep 17 00:00:00 2001
From: Junfeng Guo <junfeng.guo at intel.com>
Date: Thu, 10 Feb 2022 15:06:34 +0800
Subject: [PATCH] raw/ntb: clear all valid doorbell bits on init

[ upstream commit 3bc814fc555d8c7d1c7c63e1e831e9c34679837f ]

Before registering the doorbell interrupt handler callback function,
all the valid doorbell bits within the NTB private data struct should
be cleared to avoid the confusion of the handshake timing sequence
diagram when setting up the NTB connection in back-to-back mode.

Fixes: 62012a76811e ("raw/ntb: add handshake process")

Signed-off-by: Junfeng Guo <junfeng.guo at intel.com>
Acked-by: Jingjing Wu <jingjing.wu at intel.com>
---
 drivers/raw/ntb/ntb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/raw/ntb/ntb.c b/drivers/raw/ntb/ntb.c
index 46ac02e5ab..f5e773c53b 100644
--- a/drivers/raw/ntb/ntb.c
+++ b/drivers/raw/ntb/ntb.c
@@ -1399,4 +1399,8 @@ ntb_init_hw(struct rte_rawdev *dev, struct rte_pci_device *pci_dev)
 	/* Init doorbell. */
 	hw->db_valid_mask = RTE_LEN2MASK(hw->db_cnt, uint64_t);
+	/* Clear all valid doorbell bits before registering intr handler */
+	if (hw->ntb_ops->db_clear == NULL)
+		return -ENOTSUP;
+	(*hw->ntb_ops->db_clear)(dev, hw->db_valid_mask);
 
 	intr_handle = pci_dev->intr_handle;
-- 
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-02-21 15:22:48.828802136 +0000
+++ 0193-raw-ntb-clear-all-valid-doorbell-bits-on-init.patch	2022-02-21 15:22:44.382704782 +0000
@@ -1 +1 @@
-From 3bc814fc555d8c7d1c7c63e1e831e9c34679837f Mon Sep 17 00:00:00 2001
+From 13ddcf9dee6d72e6b61529c8254a717a01e086bb Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 3bc814fc555d8c7d1c7c63e1e831e9c34679837f ]
+
@@ -12 +13,0 @@
-Cc: stable at dpdk.org