netdev - Re: [PATCH net-next 0/5] Remove BRENTRY checks from switchdev drivers

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Date:   Wed, 16 Feb 2022 20:42:41 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Nikolay Aleksandrov <nikolay@...dia.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Ido Schimmel <idosch@...dia.com>,
        Petr Machata <petrm@...dia.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        "UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Karsten Graul <kgraul@...ux.ibm.com>,
        "linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>
Subject: Re: [PATCH net-next 0/5] Remove BRENTRY checks from switchdev drivers

On Wed, Feb 16, 2022 at 10:25:45PM +0200, Nikolay Aleksandrov wrote:
> On 16/02/2022 18:47, Vladimir Oltean wrote:
> > As discussed here:
> > https://patchwork.kernel.org/project/netdevbpf/patch/20220214233111.1586715-2-vladimir.oltean@nxp.com/#24738869
> > 
> > no switchdev driver makes use of VLAN port objects that lack the
> > BRIDGE_VLAN_INFO_BRENTRY flag. Notifying them in the first place rather
> > seems like an omission of commit 9c86ce2c1ae3 ("net: bridge: Notify
> > about bridge VLANs").
> > 
> > Since commit 3116ad0696dd ("net: bridge: vlan: don't notify to switchdev
> > master VLANs without BRENTRY flag") that was just merged, the bridge no
> > longer notifies switchdev upon creation of these VLANs, so we can remove
> > the checks from drivers.
> > 
> > Vladimir Oltean (5):
> >   mlxsw: spectrum: remove guards against !BRIDGE_VLAN_INFO_BRENTRY
> >   net: lan966x: remove guards against !BRIDGE_VLAN_INFO_BRENTRY
> >   net: sparx5: remove guards against !BRIDGE_VLAN_INFO_BRENTRY
> >   net: ti: am65-cpsw-nuss: remove guards against
> >     !BRIDGE_VLAN_INFO_BRENTRY
> >   net: ti: cpsw: remove guards against !BRIDGE_VLAN_INFO_BRENTRY
> > 
> >  drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c  |  4 +---
> >  .../net/ethernet/mellanox/mlxsw/spectrum_switchdev.c |  3 +--
> >  .../ethernet/microchip/lan966x/lan966x_switchdev.c   | 12 ------------
> >  .../net/ethernet/microchip/sparx5/sparx5_switchdev.c | 10 ++++------
> >  drivers/net/ethernet/ti/am65-cpsw-switchdev.c        |  4 ----
> >  drivers/net/ethernet/ti/cpsw_switchdev.c             |  4 ----
> >  6 files changed, 6 insertions(+), 31 deletions(-)
> 
> Notifications for placeholders shouldn't have been sent in the first place.
> Noone outside the bridge should access a vlan without brentry flag.
> 
> For the set:
> 
> Reviewed-by: Nikolay Aleksandrov <nikolay@...dia.com>

Thanks for reviewing, I didn't copy you because I didn't want to spam
your inbox even more...