inside the chip, must be called with (page & this->pagemask)

rtc_from4_errstat - perform additional error status checks : MTD device structure : NAND chip structure : state or the operation : status code returned from read status

Perform additional error status checks on erase and write failures to determine if errors are correctable. For this device, correctable 1-bit errors on erase and write are considered acceptable.

note: see pages 34..37 of data sheet for details.