netdev - Re: [patch net-next v2 2/7] devlink: make sure driver does not read updated driverinit param before reload

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Message-ID: <Y+YddzEwYA9f9RIZ@corigine.com>
Date:   Fri, 10 Feb 2023 11:33:27 +0100
From:   Simon Horman <simon.horman@...igine.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        pabeni@...hat.com, edumazet@...gle.com, tariqt@...dia.com,
        saeedm@...dia.com, jacob.e.keller@...el.com, gal@...dia.com,
        kim.phillips@....com, moshe@...dia.com, idosch@...dia.com
Subject: Re: [patch net-next v2 2/7] devlink: make sure driver does not read
 updated driverinit param before reload

On Fri, Feb 10, 2023 at 11:01:26AM +0100, Jiri Pirko wrote:
> From: Jiri Pirko <jiri@...dia.com>
> 
> The driverinit param purpose is to serve the driver during init/reload
> time to provide a value, either default or set by user.
> 
> Make sure that driver does not read value updated by user before the
> reload is performed. Hold the new value in a separate struct and switch
> it during reload.
> 
> Note that this is required to be eventually possible to call
> devl_param_driverinit_value_get() without holding instance lock.
> 
> Signed-off-by: Jiri Pirko <jiri@...dia.com>
> ---
> v1->v2:
> - extended patch description with a note

Thanks!

> - call driverinit_load_new only if action is REINIT

Reviewed-by: Simon Horman <simon.horman@...igine.com>