Since rdev->kobj is removed asynchronously, it is possible that the rdev->kobj still exists when try to add the rdev again after rdev is removed. But this path md_ioctl (HOT_ADD_DISK) -> hot_add_disk -> bind_rdev_to_array missed it. Signed-off-by: Guoqing Jiang <guoqing.jiang@xxxxxxxxxxxxxxx> --- drivers/md/md.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index b4ea0f38ccd8..2bd2d91f2015 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -7511,7 +7511,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode, } - if (cmd == ADD_NEW_DISK) + if (cmd == ADD_NEW_DISK || cmd == HOT_ADD_DISK) flush_rdev_wq(mddev); if (cmd == HOT_REMOVE_DISK) -- 2.17.1
