f2fs: avoid write_checkpoint if f2fs is mounted readonly

Do not change any partition when f2fs is changed to readonly mode.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 19021414d195..22165fb1d0d1 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1067,6 +1067,8 @@ void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
                 goto out;
         if (unlikely(f2fs_cp_error(sbi)))
                 goto out;
+        if (f2fs_readonly(sbi->sb))
+                goto out;
         if (block_operations(sbi))
                 goto out;