tree 3b4439aebb898df045080094639599c6a8a611de
parent 0e434ee8da819ab4c4ef11dadcb097c141bfb273
author Maxime Ripard <maxime.ripard@free-electrons.com> 1488216120 +0100
committer Jagan Teki <jagan@amarulasolutions.com> 1491544425 +0530

nand: sunxi: Fix modulo by zero error

When trying to autodetect the ECC and randomization configurations, the
driver starts with a randomization disabled and no seeds.

In this case, the number of seeds is obviously 0, and the randomize boolean
is set to false.

However, the logic that retrieves the seed for a given page offset will
blindly use the number of seeds, without testing if the randomization is
enabled, basically doing a modulo by 0.

As it turns out, the libgcc in the common toolchain returns 0 here, which
was our expected value in such a case, and why we would not detect it.
However, U-Boot's libgcc will for some reason return from the function
instead, resulting in an error to load the U-Boot binary in the SPL.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Scott Wood <oss@buserror.net>
Reviewed-by: Jagan Teki <jagan@openedev.com>