Re: [PATCH v2 8/9] exfat: add iomap direct I/O support

[Christoph Hellwig <hch@lst.de>]

> +static int exfat_truncate(struct inode *inode)
>  {
>  	struct super_block *sb = inode->i_sb;
>  	struct exfat_sb_info *sbi = EXFAT_SB(sb);
> @@ -315,6 +315,8 @@ void exfat_truncate(struct inode *inode)
>  	inode->i_blocks = round_up(i_size_read(inode), sbi->cluster_size) >> 9;
>  write_size:
>  	mutex_unlock(&sbi->s_lock);
> +
> +	return err;

Allowing error returns here looks unrelated to iomap usage?

> +	if (iov_iter_count(from)) {
> +		loff_t offset, end;
> +		ssize_t written;
> +		int ret2;


.. splitting this whole code block into a helper would be nice.
And eventually it might be worth to lift it to iomap as we have
a few open coded versions of it.

> +out:
> +	return ret;
> +}

Usuaully just directly returning instead of jumping to a label that
returns is easier to follow.

Otherwise this looks good:

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