patch 'raw/ntb: clear all valid doorbell bits on init' has been queued to stable release 19.11.12

[christian.ehrhardt@canonical.com]

Hi,

FYI, your patch has been queued to stable release 19.11.12

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/27/22. 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/cpaelzer/dpdk-stable-queue

This queued commit can be viewed at:
https://github.com/cpaelzer/dpdk-stable-queue/commit/37e6856e3f6e89521bdb8dd6adafeb520496ecd0

Thanks.

Christian Ehrhardt <christian.ehrhardt@canonical.com>

---
From 37e6856e3f6e89521bdb8dd6adafeb520496ecd0 Mon Sep 17 00:00:00 2001
From: Junfeng Guo <junfeng.guo@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@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@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 0f0f5c785c..c25608ee8a 100644
--- a/drivers/raw/ntb/ntb.c
+++ b/drivers/raw/ntb/ntb.c
@@ -1371,6 +1371,10 @@ 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;
 	/* Register callback func to eal lib */
-- 
2.35.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-02-25 16:58:46.415183941 +0100
+++ 0057-raw-ntb-clear-all-valid-doorbell-bits-on-init.patch	2022-02-25 16:58:44.304990469 +0100
@@ -1 +1 @@
-From 3bc814fc555d8c7d1c7c63e1e831e9c34679837f Mon Sep 17 00:00:00 2001
+From 37e6856e3f6e89521bdb8dd6adafeb520496ecd0 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 3bc814fc555d8c7d1c7c63e1e831e9c34679837f ]
+
@@ -12 +13,0 @@
-Cc: stable@dpdk.org
@@ -21 +22 @@
-index 46ac02e5ab..f5e773c53b 100644
+index 0f0f5c785c..c25608ee8a 100644
@@ -24 +25 @@
-@@ -1398,6 +1398,10 @@ ntb_init_hw(struct rte_rawdev *dev, struct rte_pci_device *pci_dev)
+@@ -1371,6 +1371,10 @@ ntb_init_hw(struct rte_rawdev *dev, struct rte_pci_device *pci_dev)
@@ -33 +34 @@
- 	intr_handle = pci_dev->intr_handle;
+ 	intr_handle = &pci_dev->intr_handle;