From: Sebastian Siewior <bigeasy@tglx.de>

and if it is, don't tell userspace that write is possible.

Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/jffs2/fs.c |    3 +++
 1 file changed, 3 insertions(+)

diff -puN fs/jffs2/fs.c~jffs2-check-if-partition-is-marked-ro-on-remount fs/jffs2/fs.c
--- a/fs/jffs2/fs.c~jffs2-check-if-partition-is-marked-ro-on-remount
+++ a/fs/jffs2/fs.c
@@ -382,6 +382,9 @@ int jffs2_remount_fs (struct super_block
 	if (c->flags & JFFS2_SB_FLAG_RO && !(sb->s_flags & MS_RDONLY))
 		return -EROFS;
 
+	if (!(c->mtd->flags & MTD_WRITEABLE))
+		return -EROFS;
+
 	/* We stop if it was running, then restart if it needs to.
 	   This also catches the case where it was stopped and this
 	   is just a remount to restart it.
_