netdev - Re: [PATCH v2 net-next 01/10] net: switchdev: remove vid_begin -> vid

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Message-ID: <20210106170818.GA1080217@shredder.lan>
Date:   Wed, 6 Jan 2021 19:08:18 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Woojung Huh <woojung.huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Vadym Kochan <vkochan@...vell.com>,
        Taras Chornyi <tchornyi@...vell.com>,
        Jiri Pirko <jiri@...dia.com>, Ido Schimmel <idosch@...dia.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Ivan Vecera <ivecera@...hat.com>
Subject: Re: [PATCH v2 net-next 01/10] net: switchdev: remove vid_begin ->
 vid_end range from VLAN objects

On Wed, Jan 06, 2021 at 03:09:57PM +0200, Vladimir Oltean wrote:
> Let's go off and finish the job of commit 29ab586c3d83 by deleting the
> bogus iteration through the VLAN ranges from the drivers. Some aspects
> of this feature never made too much sense in the first place. For
> example, what is a range of VLANs all having the BRIDGE_VLAN_INFO_PVID
> flag supposed to mean, when a port can obviously have a single pvid? The
> switchdev drivers have so far interpreted this to mean that the last
> VLAN in the range should be the only one which should get programmed
> with that attribute.

See commit 6623c60dc28e ("bridge: vlan: enforce no pvid flag in vlan
ranges")

> Of the existing switchdev pieces of hardware, it appears that only
> Mellanox Spectrum supports offloading more than one VLAN at a time.
> I have kept that code internal to the driver, because there is some more
> bookkeeping that makes use of it, but I deleted it from the switchdev
> API. But since the switchdev support for ranges has already been de
> facto deleted by a Mellanox employee and nobody noticed for 4 years, I'm
> going to assume it's not a biggie.

Which code are you referring to?

> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

For the switchdev and mlxsw parts:

Reviewed-by: Ido Schimmel <idosch@...dia.com>

I applied the series to our queue, so I should have regression results
tomorrow