linux-kernel - Re: [RFC][PATCH v2 10/31] timers: ipmi: Use del_timer

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Date:   Thu, 27 Oct 2022 10:22:54 -0500
From:   Corey Minyard <minyard@....org>
To:     Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        openipmi-developer@...ts.sourceforge.net
Subject: Re: [RFC][PATCH v2 10/31] timers: ipmi: Use del_timer_shutdown()
 before freeing timer

On Thu, Oct 27, 2022 at 10:20:15AM -0500, Corey Minyard wrote:
> On Thu, Oct 27, 2022 at 11:05:35AM -0400, Steven Rostedt wrote:
> > From: "Steven Rostedt (Google)" <rostedt@...dmis.org>
> > 
> > Before a timer is freed, del_timer_shutdown() must be called.
> 
> Thanks, this is in my queue, or:
> 
> Acked-by: Corey Minyard <cminyard@...sta.com>
> 
> if you prefer that.

Well, del_timer_shutdown() isn't there yet, so I guess the Ack is what
you need.

-corey

> 
> -corey
> 
> > 
> > Link: https://lore.kernel.org/all/20220407161745.7d6754b3@gandalf.local.home/
> > 
> > Cc: Corey Minyard <minyard@....org>
> > Cc: openipmi-developer@...ts.sourceforge.net
> > Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
> > ---
> >  drivers/char/ipmi/ipmi_msghandler.c | 2 +-
> >  drivers/char/ipmi/ipmi_ssif.c       | 4 ++--
> >  2 files changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
> > index 49a1707693c9..b577f66f3ca6 100644
> > --- a/drivers/char/ipmi/ipmi_msghandler.c
> > +++ b/drivers/char/ipmi/ipmi_msghandler.c
> > @@ -5540,7 +5540,7 @@ static void __exit cleanup_ipmi(void)
> >  		 * here.
> >  		 */
> >  		atomic_set(&stop_operation, 1);
> > -		del_timer_sync(&ipmi_timer);
> > +		del_timer_shutdown(&ipmi_timer);
> >  
> >  		initialized = false;
> >  
> > diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
> > index e1072809fe31..bb4df879a5ab 100644
> > --- a/drivers/char/ipmi/ipmi_ssif.c
> > +++ b/drivers/char/ipmi/ipmi_ssif.c
> > @@ -1273,8 +1273,8 @@ static void shutdown_ssif(void *send_info)
> >  		schedule_timeout(1);
> >  
> >  	ssif_info->stopping = true;
> > -	del_timer_sync(&ssif_info->watch_timer);
> > -	del_timer_sync(&ssif_info->retry_timer);
> > +	del_timer_shutdown(&ssif_info->watch_timer);
> > +	del_timer_shutdown(&ssif_info->retry_timer);
> >  	if (ssif_info->thread) {
> >  		complete(&ssif_info->wake_thread);
> >  		kthread_stop(ssif_info->thread);
> > -- 
> > 2.35.1