UBIFS: sync wbufs after syncing inodes and pages

All writes go through wbufs so they must be sync'd
after syncing inodes and pages.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

fs/ubifs/super.c

@@ -450,16 +450,6 @@ static int ubifs_sync_fs(struct super_block *sb, int wait)
 	if (sb->s_flags & MS_RDONLY)
 		return 0;
 
-	/*
-	 * Synchronize write buffers, because 'ubifs_run_commit()' does not
-	 * do this if it waits for an already running commit.
-	 */
-	for (i = 0; i < c->jhead_cnt; i++) {
-		err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
-		if (err)
-			return err;
-	}
-
 	/*
 	 * VFS calls '->sync_fs()' before synchronizing all dirty inodes and
 	 * pages, so synchronize them first, then commit the journal. Strictly
@@ -471,6 +461,16 @@ static int ubifs_sync_fs(struct super_block *sb, int wait)
 	 */
 	generic_sync_sb_inodes(sb, &wbc);
 
+	/*
+	 * Synchronize write buffers, because 'ubifs_run_commit()' does not
+	 * do this if it waits for an already running commit.
+	 */
+	for (i = 0; i < c->jhead_cnt; i++) {
+		err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
+		if (err)
+			return err;
+	}
+
 	err = ubifs_run_commit(c);
 	if (err)
 		return err;