summaryrefslogtreecommitdiff
path: root/drivers/mtd/ubi
diff options
context:
space:
mode:
authorRichard Weinberger <richard@nod.at>2013-08-19 08:48:12 +0200
committerArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2013-08-19 18:15:11 +0300
commit5ef4414f4bc26a19cfd5cd11aee9697a863e4d51 (patch)
treeacc970ed3980932f92e0b7a2440ba8335bae8ccd /drivers/mtd/ubi
parentb36f4be3de1b123d8601de062e7dbfc904f305fb (diff)
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: <stable@vger.kernel.org> # 3.7.x Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd/ubi')
-rw-r--r--drivers/mtd/ubi/wl.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 5df49d3cb5c7..c95bfb183c62 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1069,6 +1069,9 @@ 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);