[Skiboot] [PATCH 2/2] tpm_extendl: don't extend and log when no tpm is registered

[Claudio Carvalho]

Please disregard this patch. V2 just posted:
[Skiboot][PATCH v2 0/3] Fix tpm_extendl() for multiple/no TPM scenarios

Thanks,
Claudio Carvalho

On 10/31/2016 01:13 AM, Claudio Carvalho wrote:
> This fixes tpm_extendl() to extend and log only when the list of
> registered tpms is not empty.
> 
> Fixes: 3837c6f0cf4cffb5de874413eed755c0c698b076
> Signed-off-by: Claudio Carvalho <cclaudio at linux.vnet.ibm.com>
> ---
>  libstb/status_codes.h | 1 +
>  libstb/tpm_chip.c     | 6 ++++++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/libstb/status_codes.h b/libstb/status_codes.h
> index e67c17b..4896132 100644
> --- a/libstb/status_codes.h
> +++ b/libstb/status_codes.h
> @@ -31,6 +31,7 @@
>  #define STB_MEASURE_FAILED		-200
> 
>  /* TPM */
> +#define STB_NO_TPM_INITIALIZED	 300
>  #define STB_TPM_OVERFLOW	-300
>  #define STB_TPM_TIMEOUT	-301
> 
> diff --git a/libstb/tpm_chip.c b/libstb/tpm_chip.c
> index 0c81548..85464d9 100644
> --- a/libstb/tpm_chip.c
> +++ b/libstb/tpm_chip.c
> @@ -236,6 +236,11 @@ int tpm_extendl(TPM_Pcr pcr,
>  	failed = 0;
>  	rc = 0;
> 
> +	if (list_empty(&tpm_list)) {
> +		rc = STB_NO_TPM_INITIALIZED;
> +		goto end;
> +	}
> +
>  	list_for_each(&tpm_list, tpm, link) {
>  		if (!tpm->enabled)
>  			continue;
> @@ -304,6 +309,7 @@ int tpm_extendl(TPM_Pcr pcr,
>  	if (failed > 0)
>  		rc = STB_MEASURE_FAILED;
> 
> +end:
>  	if (tpm_measured)
>  		*tpm_measured = measured;
>  	if (tpm_failed)
>