Re: [PATCH 1/2] block-backend: add drained_poll

[Eric Blake]

On Tue, Jun 01, 2021 at 05:59:10PM +0200, Kevin Wolf wrote:
> > +++ b/block/block-backend.c
> > @@ -2393,8 +2393,13 @@ static void blk_root_drained_begin(BdrvChild *child)
> >  static bool blk_root_drained_poll(BdrvChild *child)
> >  {
> >      BlockBackend *blk = child->opaque;
> > +    int ret = 0;
> 
> It's really a bool.
> 
> >      assert(blk->quiesce_counter);
> > -    return !!blk->in_flight;
> > +
> > +    if (blk->dev_ops && blk->dev_ops->drained_poll) {
> > +        ret = blk->dev_ops->drained_poll(blk->dev_opaque);
> > +    }
> > +    return ret || !!blk->in_flight;
> >  }
> 
> Doesn't make a difference for correctness, of course, so whether you
> change it or not:
> 
> Reviewed-by: Kevin Wolf <kwolf@redhat.com>

Likewise, with that cosmetic change,
Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
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