linux-kernel - Re: [PATCH v3 3/3] platform/x86: dell-smbios: Link all dell-smbios-* modules together

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Date:   Fri, 2 Mar 2018 16:21:35 -0800
From:   Darren Hart <dvhart@...radead.org>
To:     Mario Limonciello <mario.limonciello@...l.com>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>, pali.rohar@...il.com,
        LKML <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v3 3/3] platform/x86: dell-smbios: Link all dell-smbios-*
 modules together

On Tue, Feb 27, 2018 at 12:23:04PM -0600, Mario Limonciello wrote:
> Some race conditions were raised due to dell-smbios and its backends
> not being ready by the time that a consumer would call one of the
> exported methods.
> 
> To avoid this problem, guarantee that all initialization has been
> done by linking them all together and running init for them all.
> 
> As part of this change the Kconfig needs to be adjusted so that
> CONFIG_DELL_SMBIOS_SMM and CONFIG_DELL_SMBIOS_WMI are boolean
> rather than modules.
> 
> CONFIG_DELL_SMBIOS is a visually selectable option again and both
> CONFIG_DELL_SMBIOS_WMI and CONFIG_DELL_SMBIOS_SMM are optional.
> 
> Signed-off-by: Mario Limonciello <mario.limonciello@...l.com>
> ---
> Changes from v2:
>  * Move rest of #ifdef out of source files
>  * Only compile units as necessary
> 
>  drivers/platform/x86/Kconfig            | 11 ++++++++---
>  drivers/platform/x86/Makefile           |  4 ++--
>  drivers/platform/x86/dell-smbios-base.c | 21 ++++++++++++++++++++-
>  drivers/platform/x86/dell-smbios-smm.c  | 18 ++++--------------
>  drivers/platform/x86/dell-smbios-wmi.c  | 14 ++++----------
>  drivers/platform/x86/dell-smbios.h      | 27 ++++++++++++++++++++++++++-
>  6 files changed, 64 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index 9a8f964..0c0897e 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -106,10 +106,15 @@ config ASUS_LAPTOP
>  	  If you have an ACPI-compatible ASUS laptop, say Y or M here.
>  
>  config DELL_SMBIOS
> -	tristate
> +	tristate "Dell SMBIOS driver"
> +	---help---
> +	This provides support for the Dell SMBIOS calling interface.
> +	If you have a Dell computer you should enable this option.
> +
> +	Be sure to select at least one backend for it to work properly.
>  
>  config DELL_SMBIOS_WMI
> -	tristate "Dell SMBIOS calling interface (WMI implementation)"
> +	bool "Dell SMBIOS driver WMI support"

Would you be happy with using "backend" here and for SMM?

	bool "Dell SMBIOS driver WMI backend"

It makes it obvious what the help text is referring to by "select at
least one backend".

Happy to just make this change locally, no need to resubmit.

-- 
Darren Hart
VMware Open Source Technology Center