linux/drivers/mtd/onenand
Mike Dunn edbc4540e0 mtd: driver _read() returns max_bitflips; mtd_read() returns -EUCLEAN
The drivers' _read() method, absent an error, returns a non-negative integer
indicating the maximum number of bit errors that were corrected in any one
region comprising an ecc step.  MTD returns -EUCLEAN if this is >=
bitflip_threshold, 0 otherwise.  If bitflip_threshold is zero, the comparison is
not made since these devices lack ECC and always return zero in the non-error
case (thanks Brian)¹.  Note that this is a subtle change to the driver
interface.

This and the preceding patches in this set were tested with ubi on top of the
nandsim and docg4 devices, running the ubi test io_basic from mtd-utils.

¹ http://lists.infradead.org/pipermail/linux-mtd/2012-March/040468.html

Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Ivan Djelic <ivan.djelic@parrot.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-05-13 23:14:23 -05:00
..
generic.c mtd: do not use plain 0 as NULL 2012-03-27 00:53:20 +01:00
Kconfig MTD: Relax dependencies 2012-03-25 00:29:56 +01:00
Makefile mtd: add Samsung SoC OneNAND driver 2010-05-14 01:51:20 +01:00
omap2.c mtd: do not use plain 0 as NULL 2012-03-27 00:53:20 +01:00
onenand_base.c mtd: driver _read() returns max_bitflips; mtd_read() returns -EUCLEAN 2012-05-13 23:14:23 -05:00
onenand_bbt.c Merge git://git.infradead.org/mtd-2.6 2011-11-07 09:11:16 -08:00
onenand_sim.c mtd: convert remaining users to mtd_device_register() 2011-05-25 02:25:00 +01:00
samsung.c mtd: do not use plain 0 as NULL 2012-03-27 00:53:20 +01:00