[PATCH] eal/bsd: fix spinlock not unlock in alarm callback

[Chengwen Feng]

The spinlock should unlock when clock_gettime() failed. This patch
fixes it by invoking clock_gettime() before lock.

Fixes: 26021a715067 ("eal/bsd: support alarm API")
Cc: stable at dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
---
 lib/eal/freebsd/eal_alarm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/eal/freebsd/eal_alarm.c b/lib/eal/freebsd/eal_alarm.c
index 1023c32937..1a3e6c0aad 100644
--- a/lib/eal/freebsd/eal_alarm.c
+++ b/lib/eal/freebsd/eal_alarm.c
@@ -171,12 +171,12 @@ eal_alarm_callback(void *arg __rte_unused)
 	struct timespec now;
 	struct alarm_entry *ap;
 
-	rte_spinlock_lock(&alarm_list_lk);
-	ap = LIST_FIRST(&alarm_list);
-
 	if (clock_gettime(CLOCK_TYPE_ID, &now) < 0)
 		return;
 
+	rte_spinlock_lock(&alarm_list_lk);
+	ap = LIST_FIRST(&alarm_list);
+
 	while (ap != NULL && timespec_cmp(&now, &ap->time) >= 0) {
 		ap->executing = 1;
 		ap->executing_id = pthread_self();
-- 
2.17.1