This is a note to let you know that I've just added the patch titled

mtdchar: fix usage of mtd_ooblayout_ecc()

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: mtdchar-fix-usage-of-mtd_ooblayout_ecc.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 6de564939e14327148e31ddcf769e34105176447 Mon Sep 17 00:00:00 2001

From: OuYang ZhiZhong ouyzz@yealink.com Date: Sun, 11 Mar 2018 15:59:07 +0800 Subject: mtdchar: fix usage of mtd_ooblayout_ecc()

From: OuYang ZhiZhong ouyzz@yealink.com

commit 6de564939e14327148e31ddcf769e34105176447 upstream.

Section was not properly computed. The value of OOB region definition is always ECC section 0 information in the OOB area, but we want to get all the ECC bytes information, so we should call mtd_ooblayout_ecc(mtd, section++, &oobregion) until it returns -ERANGE.

Fixes: c2b78452a9db ("mtd: use mtd_ooblayout_xxx() helpers where appropriate") Cc: stable@vger.kernel.org Signed-off-by: OuYang ZhiZhong ouyzz@yealink.com Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/mtd/mtdchar.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -487,7 +487,7 @@ static int shrink_ecclayout(struct mtd_i for (i = 0; i < MTD_MAX_ECCPOS_ENTRIES;) { u32 eccpos;

- ret = mtd_ooblayout_ecc(mtd, section, &oobregion); + ret = mtd_ooblayout_ecc(mtd, section++, &oobregion); if (ret < 0) { if (ret != -ERANGE) return ret; @@ -534,7 +534,7 @@ static int get_oobinfo(struct mtd_info * for (i = 0; i < ARRAY_SIZE(to->eccpos);) { u32 eccpos;

- ret = mtd_ooblayout_ecc(mtd, section, &oobregion); + ret = mtd_ooblayout_ecc(mtd, section++, &oobregion); if (ret < 0) { if (ret != -ERANGE) return ret;

Patches currently in stable-queue which might be from ouyzz@yealink.com are

queue-4.9/mtdchar-fix-usage-of-mtd_ooblayout_ecc.patch