From 87e773c95eb0b363f2efcc7aff8a347dc18925d0 Mon Sep 17 00:00:00 2001 From: Shmulik Ladkani Date: Wed, 4 Jul 2012 11:06:04 +0300 Subject: [PATCH] UBI: harmonize the update of ubi->beb_rsvd_pebs 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 Signed-off-by: Artem Bityutskiy --- drivers/mtd/ubi/misc.c | 23 +++++++++++++++++++++++ drivers/mtd/ubi/ubi.h | 1 + drivers/mtd/ubi/vmt.c | 20 ++------------------ 3 files changed, 26 insertions(+), 18 deletions(-) diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c index b57134d1bdee..8bbfb444b895 100644 --- a/drivers/mtd/ubi/misc.c +++ b/drivers/mtd/ubi/misc.c @@ -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. diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h index a1a81c9ea8ce..84f66e3fa05d 100644 --- a/drivers/mtd/ubi/ubi.h +++ b/drivers/mtd/ubi/ubi.h @@ -647,6 +647,7 @@ int ubi_more_leb_change_data(struct ubi_device *ubi, struct ubi_volume *vol, int ubi_calc_data_len(const struct ubi_device *ubi, const void *buf, int length); int ubi_check_volume(struct ubi_device *ubi, int vol_id); +void ubi_update_reserved(struct ubi_device *ubi); void ubi_calculate_reserved(struct ubi_device *ubi); int ubi_check_pattern(const void *buf, uint8_t patt, int size); diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c index 0669cff8ac3c..9169e58c262e 100644 --- a/drivers/mtd/ubi/vmt.c +++ b/drivers/mtd/ubi/vmt.c @@ -443,15 +443,7 @@ int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl) spin_lock(&ubi->volumes_lock); ubi->rsvd_pebs -= reserved_pebs; ubi->avail_pebs += reserved_pebs; - i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs; - if (i > 0) { - i = ubi->avail_pebs >= i ? i : ubi->avail_pebs; - ubi->avail_pebs -= i; - ubi->rsvd_pebs += i; - ubi->beb_rsvd_pebs += i; - if (i > 0) - ubi_msg("reserve more %d PEBs", i); - } + ubi_update_reserved(ubi); ubi->vol_count -= 1; spin_unlock(&ubi->volumes_lock); @@ -558,15 +550,7 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) spin_lock(&ubi->volumes_lock); ubi->rsvd_pebs += pebs; ubi->avail_pebs -= pebs; - pebs = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs; - if (pebs > 0) { - pebs = ubi->avail_pebs >= pebs ? pebs : ubi->avail_pebs; - ubi->avail_pebs -= pebs; - ubi->rsvd_pebs += pebs; - ubi->beb_rsvd_pebs += pebs; - if (pebs > 0) - ubi_msg("reserve more %d PEBs", pebs); - } + ubi_update_reserved(ubi); for (i = 0; i < reserved_pebs; i++) new_mapping[i] = vol->eba_tbl[i]; kfree(vol->eba_tbl); -- 2.20.1