UBI: Fastmap: Remove eba_orphans logic

This logic is in vain as we treat protected PEBs also as used, so this
case must not happen.
If a PEB is found which is in the EBA table but not known as used
has to be issued as fatal error.

Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 8 insertions, 83 deletions

diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index 9858bfb22314..8b95c48a002d 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -376,7 +376,6 @@ static void unmap_peb(struct ubi_attach_info *ai, int pnum)
  * @pebs: an array of all PEB numbers in the to be scanned pool
  * @pool_size: size of the pool (number of entries in @pebs)
  * @max_sqnum: pointer to the maximal sequence number
- * @eba_orphans: list of PEBs which need to be scanned
  * @free: list of PEBs which are most likely free (and go into @ai->free)
  *
  * Returns 0 on success, if the pool is unusable UBI_BAD_FASTMAP is returned.
@@ -384,12 +383,12 @@ static void unmap_peb(struct ubi_attach_info *ai, int pnum)
  */
 static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
                      int *pebs, int pool_size, unsigned long long *max_sqnum,
-                     struct list_head *eba_orphans, struct list_head *free)
+                     struct list_head *free)
 {
         struct ubi_vid_hdr *vh;
         struct ubi_ec_hdr *ech;
-        struct ubi_ainf_peb *new_aeb, *tmp_aeb;
-        int i, pnum, err, found_orphan, ret = 0;
+        struct ubi_ainf_peb *new_aeb;
+        int i, pnum, err, ret = 0;
 
         ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
         if (!ech)
@@ -457,18 +456,6 @@ static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
                         if (err == UBI_IO_BITFLIPS)
                                 scrub = 1;
 
-                        found_orphan = 0;
-                        list_for_each_entry(tmp_aeb, eba_orphans, u.list) {
-                                if (tmp_aeb->pnum == pnum) {
-                                        found_orphan = 1;
-                                        break;
-                                }
-                        }
-                        if (found_orphan) {
-                                list_del(&tmp_aeb->u.list);
-                                kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
-                        }
-
                         new_aeb = kmem_cache_alloc(ai->aeb_slab_cache,
                                                    GFP_KERNEL);
                         if (!new_aeb) {
@@ -543,10 +530,9 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
                               struct ubi_attach_info *ai,
                               struct ubi_fastmap_layout *fm)
 {
-        struct list_head used, eba_orphans, free;
+        struct list_head used, free;
         struct ubi_ainf_volume *av;
         struct ubi_ainf_peb *aeb, *tmp_aeb, *_tmp_aeb;
-        struct ubi_ec_hdr *ech;
         struct ubi_fm_sb *fmsb;
         struct ubi_fm_hdr *fmhdr;
         struct ubi_fm_scan_pool *fmpl1, *fmpl2;
@@ -560,7 +546,6 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 
         INIT_LIST_HEAD(&used);
         INIT_LIST_HEAD(&free);
-        INIT_LIST_HEAD(&eba_orphans);
         ai->min_ec = UBI_MAX_ERASECOUNTER;
 
         fmsb = (struct ubi_fm_sb *)(fm_raw);
@@ -728,28 +713,9 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
                                 }
                         }
 
-                        /* This can happen if a PEB is already in an EBA known
-                         * by this fastmap but the PEB itself is not in the used
-                         * list.
-                         * In this case the PEB can be within the fastmap pool
-                         * or while writing the fastmap it was in the protection
-                         * queue.
-                         */
                         if (!aeb) {
-                                aeb = kmem_cache_alloc(ai->aeb_slab_cache,
-                                                       GFP_KERNEL);
-                                if (!aeb) {
-                                        ret = -ENOMEM;
-
-                                        goto fail;
-                                }
-
-                                aeb->lnum = j;
-                                aeb->pnum = be32_to_cpu(fm_eba->pnum[j]);
-                                aeb->ec = -1;
-                                aeb->scrub = aeb->copy_flag = aeb->sqnum = 0;
-                                list_add_tail(&aeb->u.list, &eba_orphans);
-                                continue;
+                                ubi_err(ubi, "PEB %i is in EBA but not in used list", pnum);
+                                goto fail_bad;
                         }
 
                         aeb->lnum = j;
@@ -762,49 +728,13 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
                         dbg_bld("inserting PEB:%i (LEB %i) to vol %i",
                                 aeb->pnum, aeb->lnum, av->vol_id);
                 }
-
-                ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
-                if (!ech) {
-                        ret = -ENOMEM;
-                        goto fail;
-                }
-
-                list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &eba_orphans,
-                                         u.list) {
-                        int err;
-
-                        if (ubi_io_is_bad(ubi, tmp_aeb->pnum)) {
-                                ubi_err(ubi, "bad PEB in fastmap EBA orphan list");
-                                ret = UBI_BAD_FASTMAP;
-                                kfree(ech);
-                                goto fail;
-                        }
-
-                        err = ubi_io_read_ec_hdr(ubi, tmp_aeb->pnum, ech, 0);
-                        if (err && err != UBI_IO_BITFLIPS) {
-                                ubi_err(ubi, "unable to read EC header! PEB:%i err:%i",
-                                        tmp_aeb->pnum, err);
-                                ret = err > 0 ? UBI_BAD_FASTMAP : err;
-                                kfree(ech);
-
-                                goto fail;
-                        } else if (err == UBI_IO_BITFLIPS)
-                                tmp_aeb->scrub = 1;
-
-                        tmp_aeb->ec = be64_to_cpu(ech->ec);
-                        assign_aeb_to_av(ai, tmp_aeb, av);
-                }
-
-                kfree(ech);
         }
 
-        ret = scan_pool(ubi, ai, fmpl1->pebs, pool_size, &max_sqnum,
-                        &eba_orphans, &free);
+        ret = scan_pool(ubi, ai, fmpl1->pebs, pool_size, &max_sqnum, &free);
         if (ret)
                 goto fail;
 
-        ret = scan_pool(ubi, ai, fmpl2->pebs, wl_pool_size, &max_sqnum,
-                        &eba_orphans, &free);
+        ret = scan_pool(ubi, ai, fmpl2->pebs, wl_pool_size, &max_sqnum, &free);
         if (ret)
                 goto fail;
 
@@ -817,7 +747,6 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
         list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &used, u.list)
                 list_move_tail(&tmp_aeb->u.list, &ai->erase);
 
-        ubi_assert(list_empty(&eba_orphans));
         ubi_assert(list_empty(&free));
 
         /*
@@ -839,10 +768,6 @@ fail:
                 list_del(&tmp_aeb->u.list);
                 kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
         }
-        list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &eba_orphans, u.list) {
-                list_del(&tmp_aeb->u.list);
-                kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);
-        }
         list_for_each_entry_safe(tmp_aeb, _tmp_aeb, &free, u.list) {
                 list_del(&tmp_aeb->u.list);
                 kmem_cache_free(ai->aeb_slab_cache, tmp_aeb);