[PATCH] efi: Fix ESRT refresh after Capsule update

[Heinrich Schuchardt]

On 4/19/21 3:54 PM, Jose Marinho wrote:
> Indicated by Coverity Scan CID 331147
>
> The ESRT was being refreshed in situations where the UpdateCapsule
> procedure failed. In that scenario:
>
> 1) the ESRT refresh was superfluous.
> 2) a failed ESRT refresh return code overwrites the UpdateCapsule error
> return code.
>
> This commit ensures that the ESRT is only refreshed when the
> UpdateCapsule performs successfully.
>
> CC: Heinrich Schuchardt <xypron.glpk at gmx.de>
> CC: Sughosh Ganu <sughosh.ganu at linaro.org>
> CC: AKASHI Takahiro <takahiro.akashi at linaro.org>
> CC: Tom Rini <trini at konsulko.com>
> CC: Andre Przywara <andre.przywara at arm.com>
> CC: nd at arm.com
>
> Signed-off-by: Jose Marinho <jose.marinho at arm.com>

Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>

> ---
>   lib/efi_loader/efi_capsule.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lib/efi_loader/efi_capsule.c b/lib/efi_loader/efi_capsule.c
> index 691eda5e0d..a984c347e1 100644
> --- a/lib/efi_loader/efi_capsule.c
> +++ b/lib/efi_loader/efi_capsule.c
> @@ -481,7 +481,6 @@ efi_status_t EFIAPI efi_update_capsule(
>   		if (ret != EFI_SUCCESS)
>   			goto out;
>   	}
> -out:
>
>   	if (IS_ENABLED(CONFIG_EFI_ESRT)) {
>   		/* Rebuild the ESRT to reflect any updated FW images. */
> @@ -489,6 +488,7 @@ out:
>   		if (ret != EFI_SUCCESS)
>   			log_warning("EFI Capsule: failed to update ESRT\n");
>   	}
> +out:
>
>   	return EFI_EXIT(ret);
>   }
>