UBIFS: switch to RO mode after synchronizing

In 'ubifs_garbage_collect()' on error path, we first switch to R/O mode, and
then synchronize write-buffers (to make sure no data are lost). But the GC
write-buffer synchronization will fail, because we are already in R/O mode.
This patch re-orders this and makes sure we first synchronize the write-buffer,
and then switch to R/O mode.

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

diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c
index 918d158..f89a422 100644 (file)
--- a/fs/ubifs/gc.c
+++ b/fs/ubifs/gc.c
@@ -774,8 +774,8 @@ out_unlock:
 out:
        ubifs_assert(ret < 0);
        ubifs_assert(ret != -ENOSPC && ret != -EAGAIN);
-       ubifs_ro_mode(c, ret);
        ubifs_wbuf_sync_nolock(wbuf);
+       ubifs_ro_mode(c, ret);
        mutex_unlock(&wbuf->io_mutex);
        ubifs_return_leb(c, lp.lnum);
        return ret;