linux-kernel - Re: [PATCH 3/3] libnvdimm/pmem: Provide pmem_dax_clear

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Date:   Thu, 4 Nov 2021 10:55:15 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Jane Chu <jane.chu@...cle.com>
Cc:     dan.j.williams@...el.com, vishal.l.verma@...el.com,
        dave.jiang@...el.com, ira.weiny@...el.com, viro@...iv.linux.org.uk,
        willy@...radead.org, jack@...e.cz, nvdimm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 3/3] libnvdimm/pmem: Provide pmem_dax_clear_poison for
 dax operation

On Tue, Sep 14, 2021 at 05:31:32PM -0600, Jane Chu wrote:
> +static int pmem_dax_clear_poison(struct dax_device *dax_dev, pgoff_t pgoff,
> +					size_t nr_pages)
> +{
> +	unsigned int len = PFN_PHYS(nr_pages);
> +	sector_t sector = PFN_PHYS(pgoff) >> SECTOR_SHIFT;
> +	struct pmem_device *pmem = dax_get_private(dax_dev);
> +	phys_addr_t pmem_off = sector * 512 + pmem->data_offset;
> +	blk_status_t ret;
> +
> +	if (!is_bad_pmem(&pmem->bb, sector, len))
> +		return 0;
> +
> +	ret = pmem_clear_poison(pmem, pmem_off, len);
> +	return (ret == BLK_STS_OK) ? 0 : -EIO;

No need for the braces here (and I'd prefer a good old if anyway).

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@....de>