On Wed, 26 Mar 2014, Eric Dumazet wrote:
> On Wed, 2014-03-26 at 22:33 +0100, Julia Lawall wrote:
> > From: Julia Lawall <[email protected]>
> 
> > 
> > diff --git a/net/atm/mpc.c b/net/atm/mpc.c
> > index b71ff6b..91dc58f 100644
> > --- a/net/atm/mpc.c
> > +++ b/net/atm/mpc.c
> > @@ -1492,7 +1492,7 @@ static void __exit atm_mpoa_cleanup(void)
> >  
> >     mpc_proc_clean();
> >  
> > -   del_timer(&mpc_timer);
> > +   del_timer_sync(&mpc_timer);
> >     unregister_netdevice_notifier(&mpoa_notifier);
> >     deregister_atm_ioctl(&atm_ioctl_ops);
> >  
> 
> It seems this timer rearms itself, so this patch wont be enough I fear.

That's why you need del_timer_sync() it waits for the timer handler to
complete and then removes it.

Thanks,

        tglx

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