Re: [PATCH 2/2][next] vfio/ccw: Use struct_size() helper

[Eric Farman]

On Mon, 2023-05-22 at 19:35 -0600, Gustavo A. R. Silva wrote:
> Prefer struct_size() over open-coded versions.
> 
> Link: https://github.com/KSPP/linux/issues/160
> Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>

Reviewed-by: Eric Farman <farman@xxxxxxxxxxxxx>

> ---
>  drivers/s390/cio/vfio_ccw_drv.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/s390/cio/vfio_ccw_drv.c
> b/drivers/s390/cio/vfio_ccw_drv.c
> index 57906a9c6324..43601816ea4e 100644
> --- a/drivers/s390/cio/vfio_ccw_drv.c
> +++ b/drivers/s390/cio/vfio_ccw_drv.c
> @@ -171,8 +171,7 @@ static int vfio_ccw_sch_probe(struct subchannel
> *sch)
>                 return -ENODEV;
>         }
>  
> -       parent = kzalloc(sizeof(*parent) + sizeof(struct mdev_type
> *),
> -                        GFP_KERNEL);
> +       parent = kzalloc(struct_size(parent, mdev_types, 1),
> GFP_KERNEL);
>         if (!parent)
>                 return -ENOMEM;
>