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

[fengchengwen]

add cc maintainer

On 2023/2/13 20:44, Chengwen Feng wrote:
> 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();
>