UBI: bugfix in ubi_leb_change()

Do not call 'ubi_wl_put_peb()' if the LEB was unmapped.

Reported-by: Gabor Loki <loki@inf.u-szeged.hu>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index a1820151e9f9..0db8dc7af8a0 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -891,11 +891,13 @@ retry:
                 goto write_error;
         }
 
-        err = ubi_wl_put_peb(ubi, vol->eba_tbl[lnum], 1);
-        if (err) {
-                ubi_free_vid_hdr(ubi, vid_hdr);
-                leb_write_unlock(ubi, vol_id, lnum);
-                return err;
+        if (vol->eba_tbl[lnum] >= 0) {
+                err = ubi_wl_put_peb(ubi, vol->eba_tbl[lnum], 1);
+                if (err) {
+                        ubi_free_vid_hdr(ubi, vid_hdr);
+                        leb_write_unlock(ubi, vol_id, lnum);
+                        return err;
+                }
         }
 
         vol->eba_tbl[lnum] = pnum;