linux-kernel - Re: [Intel-wired-lan] [PATCH net 1/2] iavf: add iavf_schedule_aq

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Date:   Thu, 07 Sep 2023 09:01:10 +0200
From:   Petr Oros <poros@...hat.com>
To:     Ahmed Zaki <ahmed.zaki@...el.com>, netdev@...r.kernel.org
Cc:     ivecera@...hat.com, intel-wired-lan@...ts.osuosl.org,
        jesse.brandeburg@...el.com, linux-kernel@...r.kernel.org,
        edumazet@...gle.com, anthony.l.nguyen@...el.com, kuba@...nel.org,
        pabeni@...hat.com, davem@...emloft.net
Subject: Re: [Intel-wired-lan] [PATCH net 1/2] iavf: add
 iavf_schedule_aq_request() helper

Ahmed Zaki píše v St 06. 09. 2023 v 09:32 -0600:
> 
> On 2023-09-06 08:14, Petr Oros wrote:
> > Add helper for set iavf aq request AVF_FLAG_AQ_* and imediately
> > schedule watchdog_task. Helper will be used in cases where it is
> > necessary to run aq requests asap
> > 
> > Signed-off-by: Petr Oros <poros@...hat.com>
> > Co-developed-by: Michal Schmidt <mschmidt@...hat.com>
> > Signed-off-by: Michal Schmidt <mschmidt@...hat.com>
> > Co-developed-by: Ivan Vecera <ivecera@...hat.com>
> > Signed-off-by: Ivan Vecera <ivecera@...hat.com>
> > ---
> >   drivers/net/ethernet/intel/iavf/iavf.h         |  2 +-
> >   drivers/net/ethernet/intel/iavf/iavf_ethtool.c |  2 +-
> >   drivers/net/ethernet/intel/iavf/iavf_main.c    | 10 ++++------
> >   3 files changed, 6 insertions(+), 8 deletions(-)
> > 
> > diff --git a/drivers/net/ethernet/intel/iavf/iavf.h
> > b/drivers/net/ethernet/intel/iavf/iavf.h
> > index 85fba85fbb232b..e110ba3461857b 100644
> > --- a/drivers/net/ethernet/intel/iavf/iavf.h
> > +++ b/drivers/net/ethernet/intel/iavf/iavf.h
> > @@ -521,7 +521,7 @@ void iavf_down(struct iavf_adapter *adapter);
> >   int iavf_process_config(struct iavf_adapter *adapter);
> >   int iavf_parse_vf_resource_msg(struct iavf_adapter *adapter);
> >   void iavf_schedule_reset(struct iavf_adapter *adapter, u64
> > flags);
> > -void iavf_schedule_request_stats(struct iavf_adapter *adapter);
> > +void iavf_schedule_aq_request(struct iavf_adapter *adapter, u64
> > flags);
> >   void iavf_schedule_finish_config(struct iavf_adapter *adapter);
> >   void iavf_reset(struct iavf_adapter *adapter);
> >   void iavf_set_ethtool_ops(struct net_device *netdev);
> > diff --git a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
> > b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
> > index a34303ad057d00..90397293525f71 100644
> > --- a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
> > +++ b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
> > @@ -362,7 +362,7 @@ static void iavf_get_ethtool_stats(struct
> > net_device *netdev,
> >         unsigned int i;
> >   
> >         /* Explicitly request stats refresh */
> > -       iavf_schedule_request_stats(adapter);
> > +       iavf_schedule_aq_request(adapter,
> > IAVF_FLAG_AQ_REQUEST_STATS);
> >   
> >         iavf_add_ethtool_stats(&data, adapter,
> > iavf_gstrings_stats);
> >   
> > diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c
> > b/drivers/net/ethernet/intel/iavf/iavf_main.c
> > index 7b300c86ceda73..86d472dfdbc10c 100644
> > --- a/drivers/net/ethernet/intel/iavf/iavf_main.c
> > +++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
> > @@ -314,15 +314,13 @@ void iavf_schedule_reset(struct iavf_adapter
> > *adapter, u64 flags)
> >   }
> >   
> >   /**
> > - * iavf_schedule_request_stats - Set the flags and schedule
> > statistics request
> > + * iavf_schedule_aq_request - Set the flags and schedule aq
> > request
> >    * @adapter: board private structure
> > - *
> > - * Sets IAVF_FLAG_AQ_REQUEST_STATS flag so iavf_watchdog_task()
> > will explicitly
> > - * request and refresh ethtool stats
> > + * @flags: requested aq flags
> >    **/
> > -void iavf_schedule_request_stats(struct iavf_adapter *adapter)
> > +void iavf_schedule_aq_request(struct iavf_adapter *adapter, u64
> > flags)
> >   {
> > -       adapter->aq_required |= IAVF_FLAG_AQ_REQUEST_STATS;
> > +       adapter->aq_required |= flags;
> >         mod_delayed_work(adapter->wq, &adapter->watchdog_task, 0);
> >   }
> >   
> 
> There are other places where the helper can be used without
> functional 
> changes, e.g. iavf_add_fdir_ethtool() , iavf_replace_primary_mac()
> and 
> couple of other places. In all of them, mod_delayed_work() is called 
> after setting the AQ flag. For the sake of consistency, can you use
> the 
> helper there too?

These two commits is fixes for issue -> net. But on
iavf_add_fdir_ethtool and iavf_replace_primary_mac is mod_delayed_work
called after spin_unlock_bh ->
looks like no functional chages but i would like be sure and better
will send this to net-next. Are you ok with this?

> 
> 
> Thanks,
> 
> Ahmed
> 
>