nilfs2: fix misuse of open_bdev_exclusive/close_bdev_exclusive

The second argument of open_bdev_exclusive/close_bdev_exclusive takes
fmode_t flags instead of mount flags.  This fixes the misuse.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

1 files changed, 7 insertions, 3 deletions

diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 430a508b212f..3ff2118abd7d 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -998,10 +998,14 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
 {
         struct nilfs_super_data sd;
         struct super_block *s;
+        fmode_t mode = FMODE_READ;
         struct the_nilfs *nilfs;
         int err, need_to_close = 1;
 
-        sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
+        if (!(flags & MS_RDONLY))
+                mode |= FMODE_WRITE;
+
+        sd.bdev = open_bdev_exclusive(dev_name, mode, fs_type);
         if (IS_ERR(sd.bdev))
                 return PTR_ERR(sd.bdev);
 
@@ -1082,7 +1086,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
         mutex_unlock(&nilfs->ns_mount_mutex);
         put_nilfs(nilfs);
         if (need_to_close)
-                close_bdev_exclusive(sd.bdev, flags);
+                close_bdev_exclusive(sd.bdev, mode);
         simple_set_mnt(mnt, s);
         return 0;
 
@@ -1090,7 +1094,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags,
         mutex_unlock(&nilfs->ns_mount_mutex);
         put_nilfs(nilfs);
  failed:
-        close_bdev_exclusive(sd.bdev, flags);
+        close_bdev_exclusive(sd.bdev, mode);
 
         return err;