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Message-ID: <20190812171832.GA24564@infradead.org>
Date:   Mon, 12 Aug 2019 10:18:32 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Matthew Bobrowski <mbobrowski@...browski.org>
Cc:     linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        jack@...e.cz, tytso@....edu, riteshh@...ux.ibm.com
Subject: Re: [PATCH 3/5] iomap: modify ->end_io() calling convention

please add linux-xfs to the cc list for the whole series.  Besides
touching xfs itself it is also mentioned in MAINTAINERS for the iomap
code.

On Mon, Aug 12, 2019 at 10:53:11PM +1000, Matthew Bobrowski wrote:
> -	if (size <= 0)
> -		return size;
> +	if (error || !size)
> +		return error ? error : size;

This should be:

	if (error)
		return error;
	if (!size)
		return 0;

>  	if (flags & IOMAP_DIO_COW) {
> -		error = xfs_reflink_end_cow(ip, offset, size);
> -		if (error)
> +		ret = xfs_reflink_end_cow(ip, offset, size);
> +		if (ret)

I think we can just keep reusing error here.

> +typedef int (iomap_dio_end_io_t)(struct kiocb *iocb, ssize_t size,
> +				 ssize_t error, unsigned int flags);

error should be an int and not a ssize_t.

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