Hi > The TPM is too busy to respond to the command immediately, but the > command could be resubmitted at a later time. The TPM MAY return > TPM_RETRY for any command at any time.
> It can take several seconds before the TPM will respond again. I measured a > typical time between 3 and 4 seconds and the timeout is set at a safe 5 > seconds. > I tested a variety of TPMs from Infineon, Nuvoton, Atmel, and STMicro but was > only able to reproduce this with LPC and I2C TPMs from Infineon. Yes, our TPMs respond with TPM_RETRY if the time between two TPM_SaveState is too short to prevent wear leveling. If I remember correctly the internal timer is set to 5sec. As you've already said this is compliant with the TCG specification. Nevertheless, the patch looks good to me. Reviewed-by: Peter Huewe <peter.hu...@infineon.com> Acked-by: Peter Huewe <peter.hu...@infineon.com> Thanks, Peter -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
