[PATCH] nand: fix .correct callback return value check

[Artem Bityutskiy]

On Mon, 2010-08-09 at 07:20 +0300, Baruch Siach wrote:
> Drivers may (and do) return negative errno values other than -1 from the
> .correct callback.
> 
> Signed-off-by: Baruch Siach <baruch at tkos.co.il>

Pushed to l2-mtd-2.6.git / master, thank you!

Artem.