From 92924e7ae171609a748df38ce91763cc3e05bfa7 Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Mon, 19 Aug 2013 08:48:12 +0200 Subject: [PATCH] UBI: Fix PEB leak in wear_leveling_worker() get_peb_for_wl() removes the PEB from the free list. If the WL subsystem detects that no wear leveling is needed it cancels the operation and drops the gained PEB. In this case we have to put the PEB back into the free list. This issue was introduced with commit ed4b7021c (UBI: remove PEB from free tree in get_peb_for_wl()). Cc: # 3.7.x Signed-off-by: Richard Weinberger Signed-off-by: Artem Bityutskiy --- drivers/mtd/ubi/wl.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index d0d3c97ec..5a79e98c1 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -1020,6 +1020,9 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, if (!(e2->ec - e1->ec >= UBI_WL_THRESHOLD)) { dbg_wl("no WL needed: min used EC %d, max free EC %d", e1->ec, e2->ec); + + /* Give the unused PEB back */ + wl_tree_add(e2, &ubi->free); goto out_cancel; } self_check_in_wl_tree(ubi, e1, &ubi->used);