[U-Boot] [PATCH] nand: fix reading after switching ecc

[Jeroen Hofstee]

The omap_gpmc allows switching ecc at runtime. Since
the NAND_SUBPAGE_READ flag is only set, it is kept when
switching to hw ecc, which is not correct. This leads to
calling chip->ecc.read_subpage which is not a valid
pointer. Therefore also clear the flag so reading in
hw mode works again.

Cc: Scott Wood <scottwood at freescale.com>
Cc: Pekon Gupta <pekon at ti.com>
Cc: Nikita Kiryanov <nikita at compulab.co.il>
Signed-off-by: Jeroen Hofstee <jeroen at myspectrum.nl>
---
 drivers/mtd/nand/nand_base.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 1ce55fd..0762a19 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3354,6 +3354,8 @@ int nand_scan_tail(struct mtd_info *mtd)
 	/* Large page NAND with SOFT_ECC should support subpage reads */
 	if ((chip->ecc.mode == NAND_ECC_SOFT) && (chip->page_shift > 9))
 		chip->options |= NAND_SUBPAGE_READ;
+	else
+		chip->options &= ~NAND_SUBPAGE_READ;
 
 	/* Fill in remaining MTD driver data */
 	mtd->type = MTD_NANDFLASH;
-- 
1.8.3.2