[U-Boot] mtd: nand: omap_gpmc: fix error handling

[Tom Rini]

On Fri, Jan 02, 2015 at 02:49:10PM -0300, Guido Martínez wrote:

> "err" was an unsigned variable, causing negative error codes to turn
> into positive values, which are interpreted as an amount of succesfully
> corrected bitflips (and thus not an error).
> 
> In particular, this resulted in that if the elm reports uncorrectable
> errors (-EBADMSG), the MTD layer (and UBI) falsely succeeded.
> 
> Signed-off-by: Guido Martínez <guido at vanguardiasur.com.ar>
> Reviewed-by: Stefan Roese <sr at denx.de>

Applied to u-boot/master, thanks!

-- 
Tom
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