[PATCH 4/8] blk-mq: pass a tagset to blk_mq_wait_quiesce_done

[Christoph Hellwig]

On Fri, Oct 21, 2022 at 09:46:33AM +0800, Ming Lei wrote:
> The change is fine, but the interface could confuse people, it
> looks like it is waiting for whole tagset quiesced, but it needs
> to mark all request queues as quiesced first, otherwise it is just
> wait for one specific queue's quiesce.
> 
> So suggest to document such thing.

Yes, that's probably a good idea.  Still better would be to make
this API purely internal, as the pure wait callers in NVMe and SCSI
are a bit sketchy.