device_add_disk need do more safety error handle, so this patch just add WARN_ON. Reviewed-by: Jan Kara <jack@xxxxxxx> Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx> --- block/genhd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/genhd.c b/block/genhd.c index dd305c65ffb0..52834433878c 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -660,7 +660,7 @@ void device_add_disk(struct device *parent, struct gendisk *disk) /* Register BDI before referencing it from bdev */ bdi = disk->queue->backing_dev_info; - bdi_register_owner(bdi, disk_to_dev(disk)); + WARN_ON(bdi_register_owner(bdi, disk_to_dev(disk))); blk_register_region(disk_devt(disk), disk->minors, NULL, exact_match, exact_lock, disk); -- 2.14.2
