The ubi->free_count should be updated with every insert/remove to/from
the ubi->free list.

Signed-off-by: Tanya Brokhman <[email protected]>

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 9a36f78..ca74d19 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -690,6 +690,8 @@ static struct ubi_wl_entry *get_peb_for_wl(struct 
ubi_device *ubi)
 
        e = find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);
        self_check_in_wl_tree(ubi, e, &ubi->free);
+       ubi->free_count--;
+       ubi_assert(ubi->free_count >= 0);
        rb_erase(&e->u.rb, &ubi->free);
 
        return e;
@@ -1090,6 +1092,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, 
struct ubi_work *wrk,
 
                        /* Give the unused PEB back */
                        wl_tree_add(e2, &ubi->free);
+                       ubi->free_count++;
                        goto out_cancel;
                }
                self_check_in_wl_tree(ubi, e1, &ubi->used);
-- 
1.7.6
-- 
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