Re: [PATCH] nvme-multipath: combine grpid and ANA state checks in nvme_parse_ana_log()

[Wu Bo]

On 2021/6/8 13:23, Christoph Hellwig wrote:
> On Tue, Jun 08, 2021 at 12:13:36PM +0800, Wu Bo wrote:
> > -		if (WARN_ON_ONCE(desc->grpid == 0))
> > +		if (WARN_ON_ONCE(desc->grpid == 0 ||
> > +			le32_to_cpu(desc->grpid) > ctrl->anagrpmax))
> >   			return -EINVAL;
> > -		if (WARN_ON_ONCE(le32_to_cpu(desc->grpid) > ctrl->anagrpmax))
> > -			return -EINVAL;
> > -		if (WARN_ON_ONCE(desc->state == 0))
> > -			return -EINVAL;
> > -		if (WARN_ON_ONCE(desc->state > NVME_ANA_CHANGE))
> > +		if (WARN_ON_ONCE(desc->state == 0 ||
> > +			desc->state > NVME_ANA_CHANGE))
>
> So besides making the code impossibl to read due to the incorrect
> indentation this also makes each WARN_ON_ONCE cover multiple conditions.
> Not very useful for debugging.
> .

Indeed, not very useful for debugging, please ignore this patch.

Thanks,
Wu Bo