UBI: add more prints

I hit those situations and found out lack of print messages. Add more prints
when erase problems occur.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index a5a9b8d87302..12b25e5b7b81 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1093,6 +1093,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
                 return err;
         }
 
+        ubi_err("failed to erase PEB %d, error %d", pnum, err);
         kfree(wl_wrk);
         kmem_cache_free(wl_entries_slab, e);