[v2,3/7] ACPI / APEI: add OSC APEI bit check for ghes_edac

[Borislav Petkov <bp@alien8.de>]

On Thu, Aug 03, 2017 at 03:57:49PM -0600, Toshi Kani wrote:
> When 'osc_sb_apei_support_acked' is set, it indicates that
> the platform supports APEI, firmware-first mode, as ACPI _OSC
> capability bit 4, APEI Support, was set in query.  While _OSC
> is an optional method, platforms with APEI support should
> implement it to inform its capability to the OS properly.
> 
> Add check to 'osc_sb_apei_support_acked' before calling
> ghes_edac_register() to restrict that ghes_edac is enabled
> on platforms with APEI support capability set in _OSC.
> 
> Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Tony Luck <tony.luck@intel.com>
> ---
>  drivers/acpi/apei/ghes.c |    8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
> index d661d45..49d75eb 100644
> --- a/drivers/acpi/apei/ghes.c
> +++ b/drivers/acpi/apei/ghes.c
> @@ -1139,9 +1139,11 @@ static int ghes_probe(struct platform_device *ghes_dev)
>  		goto err;
>  	}
>  
> -	rc = ghes_edac_register(ghes, &ghes_dev->dev);
> -	if (rc < 0)
> -		goto err;
> +	if (osc_sb_apei_support_acked) {

What for when we have the whitelist?