EXT_CSD_PART_CONFIG
if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) &&
EXT_CSD_PART_CONFIG, part_config,
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];