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Date:   Tue, 8 Jun 2021 07:23:20 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Wu Bo <wubo40@huawei.com>
Cc:     kbusch@kernel.org, axboe@fb.com, hch@lst.de, sagi@grimberg.me,
        linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
        linfeilong@huawei.com
Subject: Re: [PATCH] nvme-multipath: combine grpid and ANA state checks in
 nvme_parse_ana_log()
Message-ID: <20210608052320.GA13828@lst.de>
References: <1623125616-629270-1-git-send-email-wubo40@huawei.com>
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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.