netdev - Re: [patch net-next 09/12] devlink: protect devlink param list by instance lock

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Date:   Thu, 26 Jan 2023 09:50:50 +0200
From:   Ido Schimmel <idosch@...dia.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        pabeni@...hat.com, edumazet@...gle.com, michael.chan@...adcom.com,
        jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        tariqt@...dia.com, saeedm@...dia.com, leon@...nel.org,
        petrm@...dia.com, simon.horman@...igine.com, aelior@...vell.com,
        manishc@...vell.com, jacob.e.keller@...el.com, gal@...dia.com,
        yinjun.zhang@...igine.com, fei.qin@...igine.com,
        Niklas.Cassel@....com
Subject: Re: [patch net-next 09/12] devlink: protect devlink param list by
 instance lock

On Wed, Jan 25, 2023 at 03:14:09PM +0100, Jiri Pirko wrote:
> From: Jiri Pirko <jiri@...dia.com>
> 
> Commit 1d18bb1a4ddd ("devlink: allow registering parameters after
> the instance") as the subject implies introduced possibility to register
> devlink params even for already registered devlink instance. This is a
> bit problematic, as the consistency or params list was originally
> secured by the fact it is static during devlink lifetime. So in order to
> protect the params list, take devlink instance lock during the params
> operations. Introduce unlocked function variants and use them in drivers
> in locked context. Put lock assertions to appropriate places.
> 
> Signed-off-by: Jiri Pirko <jiri@...dia.com>

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