UBIFS: mark VFS SB RO too

If some read/write error happens (eg.CRC error), UBIFS swotches to
read-only mode, but the VFS infomation still not update.
This patch add this also make /proc/mounts update.

Signed-off-by: Zhang Jiejing <kzjeef@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c
index 77d5cf4a7547..bcf5a16f30bb 100644
--- a/fs/ubifs/io.c
+++ b/fs/ubifs/io.c
@@ -64,6 +64,7 @@ void ubifs_ro_mode(struct ubifs_info *c, int err)
         if (!c->ro_media) {
                 c->ro_media = 1;
                 c->no_chk_data_crc = 0;
+                c->vfs_sb->s_flags |= MS_RDONLY;
                 ubifs_warn("switched to read-only mode, error %d", err);
                 dbg_dump_stack();
         }