mtd: rawnand: sunxi: reserve a full user-data word for BBM

H6/H616 protected user-data lengths are encoded in four-byte units,
but ECC maximization reserves only the two bad block marker bytes. A
strength leaving fewer than four bytes therefore selects a zero-byte
first user-data section.

The OOB layout then subtracts the two marker bytes from that unsigned
zero length, and the controller has no protected user-data word in which
to store the marker.

Reserve one complete user-data word while maximizing ECC, reject
configurations which produce no ECC sectors or a shorter first section,
and make the OOB iterator bounds-safe.

Fixes: 54dcd6aa69db ("mtd: rawnand: sunxi: introduce maximize variable user data length")
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

0 files changed, 0 insertions, 0 deletions