Re: [PATCH v3] acpi: Fix HED module initialization order when it is built-in

[Jonathan Cameron]

On Fri, 17 Jan 2025 10:29:57 +0800
Xiaofei Tan <tanxiaofei@xxxxxxxxxx> wrote:

> When the module HED is built-in, the module HED init is behind EVGED
> as the driver are in the same initcall level, then the order is determined
> by Makefile order. That order violates expectations. Because RAS records
> can't be handled in the special time window that EVGED has initialized
> while HED not.
> 
> If the number of such RAS records is more than the APEI HEST error source
> number, the HEST resources could be occupied all, and then could affect
> subsequent RAS error reporting.
> 
> Change the initcall level of HED to subsys_init to fix the issue. If build
> HED as a module, the problem remains. To solve this problem completely,
> change the ACPI_HED from tristate to bool.
> 
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

Given the change in approach (even though I reviewed this internally)
should probably have dropped my RB.   Anyhow, consider this me
giving it again on list.

Thanks,

Jonathan

> Signed-off-by: Xiaofei Tan <tanxiaofei@xxxxxxxxxx>
> ---
>  drivers/acpi/Kconfig | 2 +-
>  drivers/acpi/hed.c   | 1 +
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index d81b55f5068c..7f10aa38269d 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -452,7 +452,7 @@ config ACPI_SBS
>  	  the modules will be called sbs and sbshc.
>  
>  config ACPI_HED
> -	tristate "Hardware Error Device"
> +	bool "Hardware Error Device"
>  	help
>  	  This driver supports the Hardware Error Device (PNP0C33),
>  	  which is used to report some hardware errors notified via
> diff --git a/drivers/acpi/hed.c b/drivers/acpi/hed.c
> index 7652515a6be1..677dfcce2990 100644
> --- a/drivers/acpi/hed.c
> +++ b/drivers/acpi/hed.c
> @@ -81,6 +81,7 @@ static struct acpi_driver acpi_hed_driver = {
>  	},
>  };
>  module_acpi_driver(acpi_hed_driver);
> +subsys_initcall(acpi_hed_driver_init);
>  
>  MODULE_AUTHOR("Huang Ying");
>  MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");