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UBI: harmonize the update of ubi->beb_rsvd_pebs

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Currently, there are several locations where an attempt to reserve more
PEBs for bad PEB handling is made, with the same code being duplicated.

Harmonize it by introducing 'ubi_update_reserved()'.

Also, improve the debug message issued, making it more descriptive.

Artem: amended the patch a little.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
This commit is contained in:
Shmulik Ladkani
2012-07-04 11:06:04 +03:00
committed by Artem Bityutskiy
parent 5c669a5bd8
commit 87e773c95e
3 changed files with 26 additions and 18 deletions
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23
drivers/mtd/ubi/misc.c
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@@ -91,6 +91,29 @@ int ubi_check_volume(struct ubi_device *ubi, int vol_id)
return err;
}
/**
* ubi_update_reserved - update bad eraseblock handling accounting data.
* @ubi: UBI device description object
*
* This function calculates the gap between current number of PEBs reserved for
* bad eraseblock handling and the required level of PEBs that must be
* reserved, and if necessary, reserves more PEBs to fill that gap, according
* to availability. Should be called with ubi->volumes_lock held.
*/
void ubi_update_reserved(struct ubi_device *ubi)
{
int need = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
if (need <= 0 || ubi->avail_pebs == 0)
return;
need = min_t(int, need, ubi->avail_pebs);
ubi->avail_pebs -= need;
ubi->rsvd_pebs += need;
ubi->beb_rsvd_pebs += need;
ubi_msg("reserved more %d PEBs for bad PEB handling", need);
}
/**
* ubi_calculate_reserved - calculate how many PEBs must be reserved for bad
* eraseblock handling.