From beeea636030622f6de67d15c61f5b311a03d188c Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Tue, 20 May 2008 09:54:02 +0300 Subject: [PATCH] UBI: add a comment It is not clear why we schedule PEB for scrubbing in case of -EBADMSG. Elaborate. Requested-by: Kyungmin Park Signed-off-by: Artem Bityutskiy --- drivers/mtd/ubi/vtbl.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c index 3c4d68f2cf..42a7815086 100644 --- a/drivers/mtd/ubi/vtbl.c +++ b/drivers/mtd/ubi/vtbl.c @@ -385,7 +385,16 @@ static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi, err = ubi_io_read_data(ubi, leb[seb->lnum], seb->pnum, 0, ubi->vtbl_size); if (err == UBI_IO_BITFLIPS || err == -EBADMSG) - /* Scrub the PEB later */ + /* + * Scrub the PEB later. Note, -EBADMSG indicates an + * uncorrectable ECC error, but we have our own CRC and + * the data will be checked later. If the data is OK, + * the PEB will be scrubbed (because we set + * seb->scrub). If the data is not OK, the contents of + * the PEB will be recovered from the second copy, and + * seb->scrub will be cleared in + * 'ubi_scan_add_used()'. + */ seb->scrub = 1; else if (err) goto out_free; -- 2.39.5