mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 17:59:32 +00:00
UBI: separate bad_peb_limit in a function
No functional changes here, just to prepare for next patch. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
parent
60a387dc5e
commit
95e6fb027e
1 changed files with 31 additions and 23 deletions
|
@ -565,6 +565,34 @@ void ubi_free_internal_volumes(struct ubi_device *ubi)
|
|||
}
|
||||
}
|
||||
|
||||
static int get_bad_peb_limit(const struct ubi_device *ubi, int max_beb_per1024)
|
||||
{
|
||||
int limit, device_pebs;
|
||||
uint64_t device_size;
|
||||
|
||||
if (!max_beb_per1024)
|
||||
return 0;
|
||||
|
||||
/*
|
||||
* Here we are using size of the entire flash chip and
|
||||
* not just the MTD partition size because the maximum
|
||||
* number of bad eraseblocks is a percentage of the
|
||||
* whole device and bad eraseblocks are not fairly
|
||||
* distributed over the flash chip. So the worst case
|
||||
* is that all the bad eraseblocks of the chip are in
|
||||
* the MTD partition we are attaching (ubi->mtd).
|
||||
*/
|
||||
device_size = mtd_get_device_size(ubi->mtd);
|
||||
device_pebs = mtd_div_by_eb(device_size, ubi->mtd);
|
||||
limit = mult_frac(device_pebs, max_beb_per1024, 1024);
|
||||
|
||||
/* Round it up */
|
||||
if (mult_frac(limit, 1024, max_beb_per1024) < device_pebs)
|
||||
limit += 1;
|
||||
|
||||
return limit;
|
||||
}
|
||||
|
||||
/**
|
||||
* io_init - initialize I/O sub-system for a given UBI device.
|
||||
* @ubi: UBI device description object
|
||||
|
@ -582,6 +610,8 @@ void ubi_free_internal_volumes(struct ubi_device *ubi)
|
|||
*/
|
||||
static int io_init(struct ubi_device *ubi)
|
||||
{
|
||||
const int max_beb_per1024 = CONFIG_MTD_UBI_BEB_LIMIT;
|
||||
|
||||
if (ubi->mtd->numeraseregions != 0) {
|
||||
/*
|
||||
* Some flashes have several erase regions. Different regions
|
||||
|
@ -610,29 +640,7 @@ static int io_init(struct ubi_device *ubi)
|
|||
|
||||
if (mtd_can_have_bb(ubi->mtd)) {
|
||||
ubi->bad_allowed = 1;
|
||||
if (CONFIG_MTD_UBI_BEB_LIMIT > 0) {
|
||||
int per1024 = CONFIG_MTD_UBI_BEB_LIMIT;
|
||||
int limit, device_pebs;
|
||||
uint64_t device_size;
|
||||
|
||||
/*
|
||||
* Here we are using size of the entire flash chip and
|
||||
* not just the MTD partition size because the maximum
|
||||
* number of bad eraseblocks is a percentage of the
|
||||
* whole device and bad eraseblocks are not fairly
|
||||
* distributed over the flash chip. So the worst case
|
||||
* is that all the bad eraseblocks of the chip are in
|
||||
* the MTD partition we are attaching (ubi->mtd).
|
||||
*/
|
||||
device_size = mtd_get_device_size(ubi->mtd);
|
||||
device_pebs = mtd_div_by_eb(device_size, ubi->mtd);
|
||||
limit = mult_frac(device_pebs, per1024, 1024);
|
||||
|
||||
/* Round it up */
|
||||
if (mult_frac(limit, 1024, per1024) < device_pebs)
|
||||
limit += 1;
|
||||
ubi->bad_peb_limit = limit;
|
||||
}
|
||||
ubi->bad_peb_limit = get_bad_peb_limit(ubi, max_beb_per1024);
|
||||
}
|
||||
|
||||
if (ubi->mtd->type == MTD_NORFLASH) {
|
||||
|
|
Loading…
Reference in a new issue