Re: [PATCH 07/13] iomap: update ki_pos in iomap_file_buffered_write

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On 5/19/23 18:35, Christoph Hellwig wrote:
> All callers of iomap_file_buffered_write need to updated ki_pos, move it
> into common code.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

One nit below.

Acked-by: Damien Le Moal <dlemoal@xxxxxxxxxx>

> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index 063133ec77f49e..550525a525c45c 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -864,16 +864,19 @@ iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *i,
>  		.len		= iov_iter_count(i),
>  		.flags		= IOMAP_WRITE,
>  	};
> -	int ret;
> +	ssize_t ret;
>  
>  	if (iocb->ki_flags & IOCB_NOWAIT)
>  		iter.flags |= IOMAP_NOWAIT;
>  
>  	while ((ret = iomap_iter(&iter, ops)) > 0)
>  		iter.processed = iomap_write_iter(&iter, i);
> -	if (iter.pos == iocb->ki_pos)
> +
> +	if (unlikely(ret < 0))

Nit: This could be if (unlikely(ret <= 0)), no ?

>  		return ret;
> -	return iter.pos - iocb->ki_pos;
> +	ret = iter.pos - iocb->ki_pos;
> +	iocb->ki_pos += ret;
> +	return ret;


-- 
Damien Le Moal
Western Digital Research




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