SATA_POWER_IDLE
power_state = SATA_POWER_IDLE;
sdinfo->satadrv_power_level = SATA_POWER_IDLE;
if (sdinfo->satadrv_power_level == SATA_POWER_IDLE)
power_state = SATA_POWER_IDLE;
case SATA_POWER_IDLE:
sdinfo->satadrv_power_level = SATA_POWER_IDLE;
sdinfo->satadrv_power_level = SATA_POWER_IDLE;