netdev - Re: [PATCH net-next 1/3] devlink: add flash update command

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Date:   Fri, 15 Feb 2019 11:10:12 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        oss-drivers@...ronome.com, mkubecek@...e.cz, andrew@...n.ch
Subject: Re: [PATCH net-next 1/3] devlink: add flash update command

Thu, Feb 14, 2019 at 10:40:44PM CET, jakub.kicinski@...ronome.com wrote:
>Add devlink flash update command. Advanced NICs have firmware
>stored in flash and often cryptographically secured. Updating
>that flash is handled by management firmware. Ethtool has a
>flash update command which served us well, however, it has two
>shortcomings:
> - it takes rtnl_lock unnecessarily - really flash update has
>   nothing to do with networking, so using a networking device
>   as a handle is suboptimal, which leads us to the second one:
> - it requires a functioning netdev - in case device enters an
>   error state and can't spawn a netdev (e.g. communication
>   with the device fails) there is no netdev to use as a handle
>   for flashing.
>
>Devlink already has the ability to report the firmware versions,
>now with the ability to update the firmware/flash we will be
>able to recover devices in bad state.
>
>To enable updates of sub-components of the FW allow passing
>component name.  This name should correspond to one of the
>versions reported in devlink info.
>
>v1: - replace target id with component name (Jiri).
>
>Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>

Acked-by: Jiri Pirko <jiri@...lanox.com>