UBI: remove PEB from free tree in get_peb_for_wl()

If UBI is built without fastmap, get_peb_for_wl() has to
remove the PEB manially from the free tree.
Otherwise the requested PEB lives in two trees.

Reported-by: Zach Sadecki <zsadecki@itwatchdogs.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index da7b44998b40..1f9f5f7a5d0f 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -679,7 +679,13 @@ static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi)
 #else
 static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi)
 {
-        return find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);
+        struct ubi_wl_entry *e;
+
+        e = find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);
+        self_check_in_wl_tree(ubi, e, &ubi->free);
+        rb_erase(&e->u.rb, &ubi->free);
+
+        return e;
 }
 
 int ubi_wl_get_peb(struct ubi_device *ubi)