Re: [PATCH 1/5] xfs: handle NULL open_zone for merged ioends in xfs_ioend_put_open_zones

["Darrick J. Wong" <djwong@kernel.org>]

On Mon, Aug 10, 2026 at 08:37:42AM -0700, Christoph Hellwig wrote:
> In theory we could fail multiple ioends before an open zoned was assigned

...an open zone...

> to them, and the iomap code could merge them.  Check for NULL not only
> for the main ioend but also all merged ones on ->io_list to handle this
> case.
> 
> Fixes: 058dd70c65ab ("xfs: implement buffered writes to zoned RT devices")
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Seems reasonable to me.
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

--D

> ---
>  fs/xfs/xfs_aops.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
> index 2a0c54256e93..c80f05507373 100644
> --- a/fs/xfs/xfs_aops.c
> +++ b/fs/xfs/xfs_aops.c
> @@ -89,8 +89,10 @@ xfs_ioend_put_open_zones(
>  	/*
>  	 * Put the open zone for all ioends merged into this one (if any).
>  	 */
> -	list_for_each_entry(tmp, &ioend->io_list, io_list)
> -		xfs_open_zone_put(tmp->io_private);
> +	list_for_each_entry(tmp, &ioend->io_list, io_list) {
> +		if (tmp->io_private)
> +			xfs_open_zone_put(tmp->io_private);
> +	}
>  
>  	/*
>  	 * The main ioend might not have an open zone if the submission failed
> -- 
> 2.53.0
> 
>