[PATCH v3] raw/ifpga: fix pthread cannot join

[Wei Huang <wei.huang@intel.com>]

From: Tianfei Zhang <tianfei.zhang@intel.com>

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

Fixes: 9c006c45 ("raw/ifpga: scan PCIe BDF device tree")
Cc: stable@dpdk.org

Signed-off-by: Tianfei Zhang <tianfei.zhang@intel.com>
---
v2: update commit log
---
v3: set thread id to 0 after pthread_join
---
 drivers/raw/ifpga/ifpga_rawdev.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/raw/ifpga/ifpga_rawdev.c b/drivers/raw/ifpga/ifpga_rawdev.c
index 8d9db58..2bc569b 100644
--- a/drivers/raw/ifpga/ifpga_rawdev.c
+++ b/drivers/raw/ifpga/ifpga_rawdev.c
@@ -497,7 +497,7 @@ static int set_surprise_link_check_aer(
 	int gsd_enable, ret;
 #define MS 1000
 
-	while (1) {
+	while (ifpga_monitor_start) {
 		gsd_enable = 0;
 		for (i = 0; i < IFPGA_RAWDEV_NUM; i++) {
 			ifpga_rdev = &ifpga_rawdevices[i];
@@ -542,18 +542,21 @@ static int set_surprise_link_check_aer(
 static int
 ifpga_monitor_stop_func(void)
 {
+	void *status;
 	int ret;
 
-	if (ifpga_monitor_start == 1) {
+	if ((ifpga_monitor_start == 1) && ifpga_monitor_start_thread) {
+		ifpga_monitor_start = 0;
+
 		ret = pthread_cancel(ifpga_monitor_start_thread);
 		if (ret)
 			IFPGA_RAWDEV_PMD_ERR("Can't cancel the thread");
 
-		ret = pthread_join(ifpga_monitor_start_thread, NULL);
+		ret = pthread_join(ifpga_monitor_start_thread, &status);
 		if (ret)
 			IFPGA_RAWDEV_PMD_ERR("Can't join the thread");
 
-		ifpga_monitor_start = 0;
+		ifpga_monitor_start_thread = 0;
 
 		return ret;
 	}
-- 
1.8.3.1