On Mon, Aug 09, 2021 at 05:47:28PM +0200, Jan Kara wrote: > > diff --git a/block/blk-mq.c b/block/blk-mq.c > > index 2c4ac51e54eb..d2725f94491d 100644 > > --- a/block/blk-mq.c > > +++ b/block/blk-mq.c > > @@ -525,7 +525,7 @@ void blk_mq_free_request(struct request *rq) > > __blk_mq_dec_active_requests(hctx); > > > > if (unlikely(laptop_mode && !blk_rq_is_passthrough(rq))) > > - laptop_io_completion(q->backing_dev_info); > > + laptop_io_completion(queue_to_disk(q)->bdi); > > > > E.g. cannot this get called for a queue that is without a disk? As Jens already explained we need the gendisk for non-passthrough commands. Same for the wbt case.
