Re: [PATCH 1/6] Documentation: efi: emphasize watchdog deactivation on ExitBootServices

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On Wed, Oct 23, 2019 at 06:55:56PM +0200, Ahmad Fatoum wrote:
> The UEFI specification paragraph quoted above notes:
> > The watchdog timer is only used during boot services. On successful
> > completion of ExitBootServices() the watchdog timer is disabled.
> 
> Thus disabling the watchdog is _the_ only proper behavior. Adjust the
> wording accordingly.
> 
> Cc: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
> Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
> ---
>  Documentation/boards/efi.rst | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/boards/efi.rst b/Documentation/boards/efi.rst
> index 2178c9ab4293..f04b1d32378b 100644
> --- a/Documentation/boards/efi.rst
> +++ b/Documentation/boards/efi.rst
> @@ -350,7 +350,7 @@ https://uefi.org/sites/default/files/resources/UEFI_Spec_2_1_D.pdf
>  
>  Current linux kernel (v5.0) will execute ExitBootServices() during the early
>  boot stage and thus will automatically disable the (U)EFI watchdog. Since it is
> -a proper behavior according to the (U)EFI specification, it is impossible to
> +the proper behavior according to the (U)EFI specification, it is impossible to
>  protect full boot chain by using this watchdog only. It is recommended to use
>  an alternative hardware watchdog, preferably started before the bootloader. If (U)EFI
>  firmware lacks this feature, the bootloader should be able to start an alternative
> -- 
> 2.23.0
> 
> 

Reviewed-by: <o.rempel@xxxxxxxxxxxxxx>

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