linux-kernel - Re: [PATCH net-next v6 6/6] net: dsa: microchip: ksz8: move all DSA configurations to one location

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Date:   Fri, 25 Nov 2022 06:52:40 +0100
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Arun.Ramadoss@...rochip.com
Cc:     olteanv@...il.com, UNGLinuxDriver@...rochip.com,
        vivien.didelot@...il.com, andrew@...n.ch, f.fainelli@...il.com,
        kuba@...nel.org, edumazet@...gle.com, pabeni@...hat.com,
        Woojung.Huh@...rochip.com, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: Re: [PATCH net-next v6 6/6] net: dsa: microchip: ksz8: move all DSA
 configurations to one location

Hi Arun,

On Thu, Nov 24, 2022 at 03:05:27PM +0000, Arun.Ramadoss@...rochip.com wrote:
> Hi Oleksij,
> On Thu, 2022-11-24 at 11:14 +0100, Oleksij Rempel wrote:
> > EXTERNAL EMAIL: Do not click links or open attachments unless you
> > know the content is safe
> > 
> > To make the code more comparable to KSZ9477 code, move DSA
> > configurations to the same location.
> > 
> > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> > ---
> >  drivers/net/dsa/microchip/ksz8795.c | 20 ++++++++++----------
> >  1 file changed, 10 insertions(+), 10 deletions(-)
> > 
> > diff --git a/drivers/net/dsa/microchip/ksz8795.c
> > b/drivers/net/dsa/microchip/ksz8795.c
> > index 060e41b9b6ef..003b0ac2854c 100644
> > --- a/drivers/net/dsa/microchip/ksz8795.c
> > +++ b/drivers/net/dsa/microchip/ksz8795.c
> > @@ -1359,6 +1359,16 @@ int ksz8_setup(struct dsa_switch *ds)
> > 
> >         ds->mtu_enforcement_ingress = true;
> > 
> > +       /* We rely on software untagging on the CPU port, so that we
> > +        * can support both tagged and untagged VLANs
> > +        */
> > +       ds->untag_bridge_pvid = true;
> > +
> > +       /* VLAN filtering is partly controlled by the global VLAN
> > +        * Enable flag
> > +        */
> > +       ds->vlan_filtering_is_global = true;
> > +
> >         ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_FLOW_CTRL, true);
> > 
> >         /* Enable automatic fast aging when link changed detected. */
> > @@ -1418,16 +1428,6 @@ int ksz8_switch_init(struct ksz_device *dev)
> >         dev->phy_port_cnt = dev->info->port_cnt - 1;
> >         dev->port_mask = (BIT(dev->phy_port_cnt) - 1) | dev->info-
> > >cpu_ports;
> 
> Since you moved dsa related items to ksz8_setup, remaining items in
> ksz8_switch_init are
> - dev->cpu_port - Used in ksz_setup but called after the individual
> switch setup function. We can move it ksz8_setup.
> - dev->phy_port_cnt - Used in ksz8_vlan_filtering and
> ksz8_config_cpuport. We can move.
> - dev->port_mask - used in ksz_switch_register. So we cannot move.
> 
> To make the ksz8_switch_init and ksz9477_switch_init function similar,
> we can move dev->cpu_port and dev->phy_port_cnt from ksz8_switch_init
> to ksz8_setup

It make no sense to move this variables. Every place where they are
used, can be replaced with dsa functions like:
dsa_switch_for_each_user_port() or dsa_cpu_ports()/dsa_is_cpu_port()

Making this changes within this patch set make no sense to.

Regards,
Oleksij
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