UBIFS: ensure orphan area head is initialized

When mounting read-only the orphan area head is
not initialized.  It must be initialized when
remounting read/write, but it was not.  This patch
fixes that.

[Artem: sorry, added comment tweaking noise]
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 336073e4c391..fd7fc7f3b7a6 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1524,6 +1524,12 @@ static int ubifs_remount_rw(struct ubifs_info *c)
                 err = ubifs_recover_inl_heads(c, c->sbuf);
                 if (err)
                         goto out;
+        } else {
+                /* A readonly mount is not allowed to have orphans */
+                ubifs_assert(c->tot_orphans == 0);
+                err = ubifs_clear_orphans(c);
+                if (err)
+                        goto out;
         }
 
         if (!(c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY))) {