[MTD] [NAND] Blackfin NFC Driver: fix bug - do not clobber the status from the first 256 bytes if operating on 512 pages

Singed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/bf5xx_nand.c

@@ -273,7 +273,7 @@ static int bf5xx_nand_correct_data(struct mtd_info *mtd, u_char *dat,
 		dat += 256;
 		read_ecc += 8;
 		calc_ecc += 8;
-		ret = bf5xx_nand_correct_data_256(mtd, dat, read_ecc, calc_ecc);
+		ret |= bf5xx_nand_correct_data_256(mtd, dat, read_ecc, calc_ecc);
 	}
 
 	return ret;