Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <1b7f3aac-0941-2554-d966-01a6bf76cc58@acm.org>
Date:   Tue, 3 May 2022 10:01:45 -0700
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.7.0
Subject: Re: [PATCH 13/16] null_blk: allow non power of 2 zoned devices
Content-Language: en-US
To:     Pankaj Raghav <p.raghav@samsung.com>, jaegeuk@kernel.org,
        axboe@kernel.dk, snitzer@kernel.org, hch@lst.de, mcgrof@kernel.org,
        naohiro.aota@wdc.com, sagi@grimberg.me,
        damien.lemoal@opensource.wdc.com, dsterba@suse.com,
        johannes.thumshirn@wdc.com
Cc:     linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org,
        clm@fb.com, gost.dev@samsung.com, chao@kernel.org,
        linux-f2fs-devel@lists.sourceforge.net, josef@toxicpanda.com,
        jonathan.derrick@linux.dev, agk@redhat.com, kbusch@kernel.org,
        kch@nvidia.com, linux-nvme@lists.infradead.org,
        dm-devel@redhat.com, jiangbo.365@bytedance.com,
        linux-fsdevel@vger.kernel.org, matias.bjorling@wdc.com,
        linux-block@vger.kernel.org
References: <20220427160255.300418-1-p.raghav@samsung.com>
 <CGME20220427160310eucas1p28cd3c5ff4fb7a04bc77c4c0b9d96bb74@eucas1p2.samsung.com>
 <20220427160255.300418-14-p.raghav@samsung.com>
From:   Bart Van Assche <bvanassche@acm.org>
In-Reply-To: <20220427160255.300418-14-p.raghav@samsung.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 4/27/22 09:02, Pankaj Raghav wrote:
> diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
> index c441a4972064..82a62b543782 100644
> --- a/drivers/block/null_blk/main.c
> +++ b/drivers/block/null_blk/main.c
> @@ -1931,8 +1931,8 @@ static int null_validate_conf(struct nullb_device *dev)
>   		dev->mbps = 0;
>   
>   	if (dev->zoned &&
> -	    (!dev->zone_size || !is_power_of_2(dev->zone_size))) {
> -		pr_err("zone_size must be power-of-two\n");
> +	    (!dev->zone_size)) {
> +		pr_err("zone_size must not be zero\n");
>   		return -EINVAL;
>   	}

Please combine "if (dev->zoned &&" and "(!dev->zone_size)) {" into a 
single line and leave out the parentheses that became superfluous.

Thanks,

Bart.