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

[Long Li]

> Subject: Re: [DPDK] /lib/eal: fix failed to stop device monitor error
> 
> Hello,
> 
> 
> The title should start with eal/linux:
> 
> On Fri, Feb 11, 2022 at 10:01 AM <wenxuanx.wu at intel.com> wrote:
> >
> > From: Wenxuan Wu <wenxuanx.wu at 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.
> 
> Please, fix formatting around ',': a space should be after.
> 
> 
> Is it a real issue you noticed? Or a theoretical issue based on code review,
> reported by a static code analysis tool?
> 
> 
> >
> > Fixes: 1fef6ced07f3 ("eal/linux: allow multiple starts of event
> > monitor") Cc:stable at intel.com
> 
> stable at dpdk.org
> 
> >
> > Signed-off-by: Wenxuan Wu <wenxuanx.wu at 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--;
> >
> 
> This change looks ok to me.
> Harman, Long, wdyt?

The change looks good to me.

Long