nand_erase_nand
int nand_erase_nand(struct nand_chip *chip, struct erase_info *instr,
return nand_erase_nand(mtd_to_nand(mtd), instr, 0);
nand_erase_nand(chip, &einfo, 0);
res = nand_erase_nand(this, &einfo, 1);