linux-kernel - Re: [PATCH v5 09/14] platform/x86: dell-smbios: Introduce dispatcher for SMM calls

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Message-ID: <CAHp75VeD+KReTDfBA2mTG=DczbGf74T5Fyo7NNcaVNp0nqdXfA@mail.gmail.com>
Date:   Sun, 8 Oct 2017 18:48:44 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Mario Limonciello <mario.limonciello@...l.com>
Cc:     "dvhart@...radead.org" <dvhart@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>, quasisec@...gle.com,
        Pali Rohár <pali.rohar@...il.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>, mjg59@...gle.com,
        Christoph Hellwig <hch@....de>, Greg KH <greg@...ah.com>
Subject: Re: [PATCH v5 09/14] platform/x86: dell-smbios: Introduce dispatcher
 for SMM calls

On Sat, Oct 7, 2017 at 7:59 AM, Mario Limonciello
<mario.limonciello@...l.com> wrote:
> This splits up the dell-smbios driver into two drivers:
> * dell-smbios
> * dell-smbios-smm
>
> dell-smbios can operate with multiple different dispatcher drivers to
> perform SMBIOS operations.
>
> Also modify the interface that dell-laptop and dell-wmi use align to this
> model more closely.  Rather than a single global buffer being allocated
> for all drivers, each driver will allocate and be responsible for it's own
> buffer. The pointer will be passed to the calling function and each
> dispatcher driver will then internally copy it to the proper location to
> perform it's call.

>  config DELL_SMBIOS
>         tristate

> +       depends on DELL_SMBIOS_SMM
> +

If the above dependency is true (which I'm quite sure not) this split
should never happen.

> +config DELL_SMBIOS_SMM
> +       tristate "Dell SMBIOS calling interface (SMM implementation)"
> +       depends on DCDBAS
> +       default DCDBAS
> +       select DELL_SMBIOS
>         ---help---
> +       This provides an implementation for the Dell SMBIOS calling interface
> +       communicated over SMI/SMM.
>
> +       If you have a Dell computer from <=2017 you should say Y or M here.
> +       If you aren't sure and this module doesn't work for your computer
> +       it just won't load.


-- 
With Best Regards,
Andy Shevchenko