linux-kernel - Re: [PATCH] firmware: arm_scmi: Add protocol versioning checks

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Message-ID: <170169770105.30728.4184748461867553378.b4-ty@arm.com>
Date:   Mon,  4 Dec 2023 13:49:12 +0000
From:   Sudeep Holla <sudeep.holla@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Cristian Marussi <cristian.marussi@....com>
Cc:     Sudeep Holla <sudeep.holla@....com>, vincent.guittot@...aro.org,
        souvik.chakravarty@....com, nicola.mazzucato@....com
Subject: Re: [PATCH] firmware: arm_scmi: Add protocol versioning checks

On Fri, 01 Dec 2023 13:58:58 +0000, Cristian Marussi wrote:
> Platform and agent supported protocols versions do not necessarily match.
>
> When talking to an older platform SCMI server, supporting only older
> protocol versions, the kernel SCMI agent will downgrade the version of
> the used protocol to match the platform one and avoid compatibility issues.
>
> In the case, instead, in which the agent happens to communicate with a
> newer platform server which can support newer protocol versions unknown to
> the agent, and potentially backward incompatible, the agent currently
> carries on, silently, in a best-effort approach.
>
> [...]

Applied to sudeep.holla/linux (for-next/scmi/updates), thanks!

[1/1] firmware: arm_scmi: Add protocol versioning checks
      https://git.kernel.org/sudeep.holla/c/b5efc28a754d
--
Regards,
Sudeep