patch 'raw/ifpga: fix thread closing' has been queued to stable release 20.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/20/22. 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/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/f05952e7bfe65f8be8f4611da54229ade0e0a310

Thanks.

Luca Boccassi

---
>From f05952e7bfe65f8be8f4611da54229ade0e0a310 Mon Sep 17 00:00:00 2001
From: Tianfei Zhang <tianfei.zhang at intel.com>
Date: Sun, 23 Jan 2022 22:50:05 -0500
Subject: [PATCH] raw/ifpga: fix thread closing

[ upstream commit 60e68d170b122d86c1c49cc51078db461542a26b ]

When we want to close a thread, we should set a flag to notify
thread handler function.

Fixes: 9c006c45d0c5 ("raw/ifpga: scan PCIe BDF device tree")

Signed-off-by: Tianfei Zhang <tianfei.zhang at intel.com>
Acked-by: Rosen Xu <rosen.xu at intel.com>
---
 drivers/raw/ifpga/ifpga_rawdev.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/raw/ifpga/ifpga_rawdev.c b/drivers/raw/ifpga/ifpga_rawdev.c
index 0b0b1be00f..d421d14d68 100644
--- a/drivers/raw/ifpga/ifpga_rawdev.c
+++ b/drivers/raw/ifpga/ifpga_rawdev.c
@@ -497,7 +497,7 @@ ifpga_rawdev_gsd_handle(__rte_unused void *param)
 	int gsd_enable, ret;
 #define MS 1000
 
-	while (1) {
+	while (__atomic_load_n(&ifpga_monitor_start, __ATOMIC_RELAXED)) {
 		gsd_enable = 0;
 		for (i = 0; i < IFPGA_RAWDEV_NUM; i++) {
 			ifpga_rdev = &ifpga_rawdevices[i];
@@ -525,7 +525,7 @@ ifpga_monitor_start_func(void)
 {
 	int ret;
 
-	if (ifpga_monitor_start == 0) {
+	if (!__atomic_load_n(&ifpga_monitor_start, __ATOMIC_RELAXED)) {
 		ret = pthread_create(&ifpga_monitor_start_thread,
 			NULL,
 			ifpga_rawdev_gsd_handle, NULL);
@@ -534,7 +534,7 @@ ifpga_monitor_start_func(void)
 				"Fail to create ifpga monitor thread");
 			return -1;
 		}
-		ifpga_monitor_start = 1;
+		__atomic_store_n(&ifpga_monitor_start, 1, __ATOMIC_RELAXED);
 	}
 
 	return 0;
@@ -544,7 +544,9 @@ ifpga_monitor_stop_func(void)
 {
 	int ret;
 
-	if (ifpga_monitor_start == 1) {
+	if (__atomic_load_n(&ifpga_monitor_start, __ATOMIC_RELAXED)) {
+		__atomic_store_n(&ifpga_monitor_start, 0, __ATOMIC_RELAXED);
+
 		ret = pthread_cancel(ifpga_monitor_start_thread);
 		if (ret)
 			IFPGA_RAWDEV_PMD_ERR("Can't cancel the thread");
@@ -553,8 +555,6 @@ ifpga_monitor_stop_func(void)
 		if (ret)
 			IFPGA_RAWDEV_PMD_ERR("Can't join the thread");
 
-		ifpga_monitor_start = 0;
-
 		return ret;
 	}
 
-- 
2.30.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-02-18 12:37:40.010052003 +0000
+++ 0051-raw-ifpga-fix-thread-closing.patch	2022-02-18 12:37:37.674791563 +0000
@@ -1 +1 @@
-From 60e68d170b122d86c1c49cc51078db461542a26b Mon Sep 17 00:00:00 2001
+From f05952e7bfe65f8be8f4611da54229ade0e0a310 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 60e68d170b122d86c1c49cc51078db461542a26b ]
+
@@ -10 +11,0 @@
-Cc: stable at dpdk.org
@@ -19 +20 @@
-index 0eae0c9477..fdf3c23d2c 100644
+index 0b0b1be00f..d421d14d68 100644
@@ -37,3 +38,3 @@
- 		ret = rte_ctrl_thread_create(&ifpga_monitor_start_thread,
- 					     "ifpga-monitor", NULL,
- 					     ifpga_rawdev_gsd_handle, NULL);
+ 		ret = pthread_create(&ifpga_monitor_start_thread,
+ 			NULL,
+ 			ifpga_rawdev_gsd_handle, NULL);