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-rw-r--r--drivers/mtd/ubi/fastmap.c33
1 files changed, 29 insertions, 4 deletions
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index c1f5c29e458e..b44c8d348e78 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -828,6 +828,24 @@ static int find_fm_anchor(struct ubi_attach_info *ai)
return ret;
}
+static struct ubi_ainf_peb *clone_aeb(struct ubi_attach_info *ai,
+ struct ubi_ainf_peb *old)
+{
+ struct ubi_ainf_peb *new;
+
+ new = ubi_alloc_aeb(ai, old->pnum, old->ec);
+ if (!new)
+ return NULL;
+
+ new->vol_id = old->vol_id;
+ new->sqnum = old->sqnum;
+ new->lnum = old->lnum;
+ new->scrub = old->scrub;
+ new->copy_flag = old->copy_flag;
+
+ return new;
+}
+
/**
* ubi_scan_fastmap - scan the fastmap.
* @ubi: UBI device object
@@ -847,7 +865,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
struct ubi_vid_hdr *vh;
struct ubi_ec_hdr *ech;
struct ubi_fastmap_layout *fm;
- struct ubi_ainf_peb *tmp_aeb, *aeb;
+ struct ubi_ainf_peb *aeb;
int i, used_blocks, pnum, fm_anchor, ret = 0;
size_t fm_size;
__be32 crc, tmp_crc;
@@ -857,9 +875,16 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
if (fm_anchor < 0)
return UBI_NO_FASTMAP;
- /* Move all (possible) fastmap blocks into our new attach structure. */
- list_for_each_entry_safe(aeb, tmp_aeb, &scan_ai->fastmap, u.list)
- list_move_tail(&aeb->u.list, &ai->fastmap);
+ /* Copy all (possible) fastmap blocks into our new attach structure. */
+ list_for_each_entry(aeb, &scan_ai->fastmap, u.list) {
+ struct ubi_ainf_peb *new;
+
+ new = clone_aeb(ai, aeb);
+ if (!new)
+ return -ENOMEM;
+
+ list_add(&new->u.list, &ai->fastmap);
+ }
down_write(&ubi->fm_protect);
memset(ubi->fm_buf, 0, ubi->fm_size);