ACK: [PATCH] lib: fwts_cpu: check for MSR read failures

[ivanhu]

On 2016年02月17日 07:49, Colin King wrote:
> From: Colin Ian King <colin.king at canonical.com>
>
> We should check to see if MSR reads fail and if so return a bool
> error status.
>
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
> ---
>   src/lib/src/fwts_cpu.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/src/lib/src/fwts_cpu.c b/src/lib/src/fwts_cpu.c
> index 2874f03..7a4b5b2 100644
> --- a/src/lib/src/fwts_cpu.c
> +++ b/src/lib/src/fwts_cpu.c
> @@ -219,9 +219,12 @@ fwts_bool fwts_cpu_has_c1e(void)
>                    * by erratum #400
>                    */
>   		if (strstr(cpu->flags, "osvw") != NULL) {
> -			fwts_cpu_readmsr(0, MSR_AMD64_OSVW_ID_LENGTH, &val);
> +			if (fwts_cpu_readmsr(0, MSR_AMD64_OSVW_ID_LENGTH, &val) != FWTS_OK)
> +				return FWTS_BOOL_ERROR;
> +
>                           if (val >= 2) {
> -                                fwts_cpu_readmsr(0, MSR_AMD64_OSVW_STATUS, &val);
> +                                if (fwts_cpu_readmsr(0, MSR_AMD64_OSVW_STATUS, &val) != FWTS_OK)
> +					return FWTS_BOOL_ERROR;
>                                   if (!(val & 2)) {
>   					fwts_cpu_free_info(cpu);
>   					return FWTS_FALSE;
>

Acked-by: Ivan Hu <ivan.hu at canonical.com>