[PATCH 1/4] mtd: cfi_cmdset_0002: Change write buffer to check correct value

[ikegami@xxxxxxxxxxxxxxxxxxxx (Tokunori Ikegami)]

For the word write it is checked if the chip has the correct value.
But it is not checked for the write buffer as only checked if ready.
To make sure for the write buffer change to check the value.

It is enough as this patch is only checking the last written word.
Since it is described by data sheets to check the operation status.

Signed-off-by: Tokunori Ikegami <ikegami at allied-telesis.co.jp>
Reviewed-by: Joakim Tjernlund <Joakim.Tjernlund at infinera.com>
Cc: Chris Packham <chris.packham at alliedtelesis.co.nz>
Cc: Brian Norris <computersforpeace at gmail.com>
Cc: David Woodhouse <dwmw2 at infradead.org>
Cc: Boris Brezillon <boris.brezillon at free-electrons.com>
Cc: Marek Vasut <marek.vasut at gmail.com>
Cc: Richard Weinberger <richard at nod.at>
Cc: Cyrille Pitchen <cyrille.pitchen at wedev4u.fr>
Cc: linux-mtd at lists.infradead.org
Cc: stable at vger.kernel.org
Signed-off-by: Boris Brezillon <boris.brezillon at bootlin.com>
---
 drivers/mtd/chips/cfi_cmdset_0002.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 692902df2598..9ab521d25ea2 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -1880,7 +1880,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 		if (time_after(jiffies, timeo) && !chip_ready(map, adr))
 			break;
 
-		if (chip_ready(map, adr)) {
+		if (chip_good(map, adr, datum)) {
 			xip_enable(map, chip, adr);
 			goto op_done;
 		}
-- 
2.16.1