[PATCH v4] raw/ifpga: fix pthread cannot join

[Wei Huang]

From: Tianfei Zhang <tianfei.zh...@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: sta...@dpdk.org

Signed-off-by: Tianfei Zhang <tianfei.zh...@intel.com>
---
v2: update commit log
---
v3: set thread id to 0 after pthread_join
---
v4: do not evaluate and set pthread_t variable
---
 drivers/raw/ifpga/ifpga_rawdev.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/raw/ifpga/ifpga_rawdev.c b/drivers/raw/ifpga/ifpga_rawdev.c
index 8d9db58..cb5166e 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];
@@ -542,19 +542,20 @@ static int set_surprise_link_check_aer(
 static int
 ifpga_monitor_stop_func(void)
 {
+       void *status;
        int ret;
 
        if (ifpga_monitor_start == 1) {
+               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;
-
                return ret;
        }
 
-- 
1.8.3.1