btrfs: sysfs: check initialization state before updating features

If the mount phase is not finished, we can't update the sysfs files.

Reported-by: Chris Mason <clm@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 6986886..539e7b5 100644 (file)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -804,6 +804,9 @@ void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
        fs_devs = fs_info->fs_devices;
        fsid_kobj = &fs_devs->fsid_kobj;
 
+       if (!fsid_kobj->state_initialized)
+               return;
+
        /*
         * FIXME: this is too heavy to update just one value, ideally we'd like
         * to use sysfs_update_group but some refactoring is needed first.