linux-kernel - Re: [PATCH] Bug fix: Clear ack of GHES table which contain wrong Error status block, let new error can fill GHES table.

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Date:   Mon, 30 Oct 2017 09:53:39 -0400
From:   Tyler Baicar <tbaicar@...eaurora.org>
To:     Qiang Zheng <zhengqiang10@...wei.com>, will.deacon@....com,
        james.morse@....com, shiju.jose@...wei.com, rjw@...ysocki.net
Cc:     gengdongjiu@...wei.com, wangxiongfeng2@...wei.com,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com
Subject: Re: [PATCH] Bug fix: Clear ack of GHES table which contain wrong
 Error status block, let new error can fill GHES table.

On 10/29/2017 9:23 PM, Qiang Zheng wrote:
> Current Error status block processing flow, if wrong format is checked,
> GHES table ack is not cleared.
> It will cause new error can not be filled GHES table, because UEFI
> need check ack to know if error was handled by OS.
>
> This patch solved issue, no matter Error status block format is wrong,
> But GHES table format is corrected, we clear ack.
>
> Signed-off-by: Qiang Zheng <zhengqiang10@...wei.com>
> ---
>   drivers/acpi/apei/ghes.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
> index 077f9ba..b0e0782 100644
> --- a/drivers/acpi/apei/ghes.c
> +++ b/drivers/acpi/apei/ghes.c
> @@ -743,6 +743,7 @@ static int ghes_proc(struct ghes *ghes)
>   	}
>   	ghes_do_proc(ghes, ghes->estatus);
>   
> +out:
The out goto is already at this location. Please sync to the tip:

         ghes_do_proc(ghes, ghes->estatus);

out:
         ghes_clear_estatus(ghes);

         if (rc == -ENOENT)
                 return rc;

         /*
          * GHESv2 type HEST entries introduce support for error acknowledgment,
          * so only acknowledge the error if this support is present.
          */
         if (is_hest_type_generic_v2(ghes))
                 return ghes_ack_error(ghes->generic_v2);

         return rc;


>   	/*
>   	 * GHESv2 type HEST entries introduce support for error acknowledgment,
>   	 * so only acknowledge the error if this support is present.
> @@ -752,7 +753,7 @@ static int ghes_proc(struct ghes *ghes)
>   		if (rc)
>   			return rc;
>   	}
> -out:
> +
>   	ghes_clear_estatus(ghes);
>   	return rc;
>   }

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