From ebf53f421308c2f59c9bcbad4c5c297a0d00199a Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Mon, 6 Jul 2009 08:57:53 +0300 Subject: UBI: fix NOR flash recovery This commit fixes NOR flash recovery issues observed with Spansion S29GL512N NOR. When NOR erases, it first fills PEBs with zeroes, then sets all bytes to 0xFF. Filling with zeroes starts from the end of the PEB. And when power is cut, this results in PEBs containing correct EC and VID headers but corrupted with zeros at the end. This confuses UBI and it mistakinly accepts these PEBs and associate them with LEBs. Fis this issue by zeroing EC and VID magics before erasing PEBs, to make UBI later refuse zem. Signed-off-by: Artem Bityutskiy --- drivers/mtd/ubi/build.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/mtd/ubi/build.c') diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index db0b9cb64c6c..e1f7d0a78b9d 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -657,6 +657,11 @@ static int io_init(struct ubi_device *ubi) if (ubi->mtd->block_isbad && ubi->mtd->block_markbad) ubi->bad_allowed = 1; + if (ubi->mtd->type == MTD_NORFLASH) { + ubi_assert(ubi->mtd->writesize == 1); + ubi->nor_flash = 1; + } + ubi->min_io_size = ubi->mtd->writesize; ubi->hdrs_min_io_size = ubi->mtd->writesize >> ubi->mtd->subpage_sft; -- cgit v1.2.1