[PATCH 6/9] s390/block/dasd_genhd: add error handling support for add_disk()

[Christoph Hellwig]

On Mon, Sep 13, 2021 at 10:17:48AM +0200, Jan H??ppner wrote:
> I think, just like with some of the other changes, there is some
> cleanup required before returning. I'll prepare a patch and
> come back to you.

If you are touching the dasd probe path anyway, can you look insto
switching to use blk_mq_alloc_disk as well?  Right now dasd allocates
the request_queue and gendisk separately in different stages of
initialization, but unlike SCSI which needs to probe using just the
request_queue I can't find a good reason for that.