Re: [DPDK] /lib/eal: fix failed to stop device monitor error

[Thomas Monjalon <thomas@monjalon.net>]

+Cc Harman, maintainer of interrupt subsystem.

11/02/2022 09:41, wenxuanx.wu@intel.com:
> From: Wenxuan Wu <wenxuanx.wu@intel.com>
> 
> The ret value in rte_dev_event_monitor_stop stands for whether the
> monitor has been successfully closed ,and should not bind with
> rte_intr_callback_unregister,so once it goes to the right exit point of
> rte_dev_event_monitor, the ret value should be set to 0.
> 
> Also ,the refmonitor count has been carefully evaluated ,the value
> change from 1 to 0 ,so there is no potential memory leak failure.
> 
> Fixes: 1fef6ced07f3 ("eal/linux: allow multiple starts of event monitor")
> Cc:stable@intel.com
> 
> Signed-off-by: Wenxuan Wu <wenxuanx.wu@intel.com>
> ---
>  lib/eal/linux/eal_dev.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/lib/eal/linux/eal_dev.c b/lib/eal/linux/eal_dev.c
> index bde55a3d92..4646e8a550 100644
> --- a/lib/eal/linux/eal_dev.c
> +++ b/lib/eal/linux/eal_dev.c
> @@ -384,6 +384,7 @@ rte_dev_event_monitor_stop(void)
>  	close(rte_intr_fd_get(intr_handle));
>  	rte_intr_instance_free(intr_handle);
>  	intr_handle = NULL;
> +	ret = 0;
>  
>  	monitor_refcount--;
>  
>