diff options
| author | Shmulik Ladkani <shmulik.ladkani@gmail.com> | 2012-07-04 11:06:00 +0300 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-09-04 09:38:58 +0300 |
| commit | 8beeb3bb9df8caba36ad3e4f226255dff9c92556 (patch) | |
| tree | 4758809d39183d7aaccaa8178c5d5150c2bf1a9d /drivers/mtd/ubi/build.c | |
| parent | afe7d12b6d997ff8ceff02e405eae9ba54aa8350 (diff) | |
UBI: introduce new bad PEB limit
Introduce 'ubi->bad_peb_limit', which specifies an upper limit of PEBs
UBI expects to go bad. Currently, it is initialized to a fixed percentage
of total PEBs in the UBI device (configurable via CONFIG_MTD_UBI_BEB_LIMIT).
The 'bad_peb_limit' is intended to be used for calculating the amount of PEBs
UBI needs to reserve for bad eraseblock handling.
Artem: minor amendments.
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd/ubi/build.c')
| -rw-r--r-- | drivers/mtd/ubi/build.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 3174dd40095..ce311aa75a7 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -607,8 +607,18 @@ static int io_init(struct ubi_device *ubi) ubi->peb_count = mtd_div_by_eb(ubi->mtd->size, ubi->mtd); ubi->flash_size = ubi->mtd->size; - if (mtd_can_have_bb(ubi->mtd)) + if (mtd_can_have_bb(ubi->mtd)) { ubi->bad_allowed = 1; + if (CONFIG_MTD_UBI_BEB_LIMIT > 0) { + int percent = CONFIG_MTD_UBI_BEB_LIMIT; + int limit = mult_frac(ubi->peb_count, percent, 100); + + /* Round it up */ + if (mult_frac(limit, 100, percent) < ubi->peb_count) + limit += 1; + ubi->bad_peb_limit = limit; + } + } if (ubi->mtd->type == MTD_NORFLASH) { ubi_assert(ubi->mtd->writesize == 1); |