linux-kernel - Re: [PATCH net-next 4/6] devlink: Clean registration of devlink port

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Message-ID: <20211117204929.4bd24597@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Wed, 17 Nov 2021 20:49:29 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Leon Romanovsky <leonro@...dia.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>, Aya Levin <ayal@...lanox.com>,
        Claudiu Manoil <claudiu.manoil@....com>, drivers@...sando.io,
        Florian Fainelli <f.fainelli@...il.com>,
        Ido Schimmel <idosch@...dia.com>,
        intel-wired-lan@...ts.osuosl.org,
        Ioana Ciornei <ioana.ciornei@....com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Jiri Pirko <jiri@...dia.com>, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org,
        Michael Chan <michael.chan@...adcom.com>,
        netdev@...r.kernel.org, oss-drivers@...igine.com,
        Saeed Mahameed <saeedm@...dia.com>,
        Shannon Nelson <snelson@...sando.io>,
        Simon Horman <simon.horman@...igine.com>,
        Taras Chornyi <tchornyi@...vell.com>,
        Tariq Toukan <tariqt@...dia.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        UNGLinuxDriver@...rochip.com,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: Re: [PATCH net-next 4/6] devlink: Clean registration of devlink
 port

On Wed, 17 Nov 2021 20:26:20 +0200 Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@...dia.com>
> 
> devlink_port_register() is in-kernel API and as such can't really fail
> as long as driver author didn't make a mistake by providing already existing
> port index. Instead of relying on various error prints from the driver,
> convert the existence check to be WARN_ON(), so such a mistake will be
> caught easier.
> 
> As an outcome of this conversion, it was made clear that this function
> should be void and devlink->lock was intended to protect addition to
> port_list.

Leave this error checking in please.