Virtualization - Jul 2021 - [PATCH 4/4] vdpa: Add documentation for vdpa_alloc_device() macro

? 2021/7/15 ??4:00, Xie Yongji ??:
> The return value of vdpa_alloc_device() macro is not very
> clear, so that most of callers did the wrong check. Let's
> add some comments to better document it.
>
> Signed-off-by: Xie Yongji <xieyongji at bytedance.com>

Acked-by: Jason Wang <jasowang at redhat.com>

> ---
>   include/linux/vdpa.h | 11 +++++++++++
>   1 file changed, 11 insertions(+)
>
> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> index 3357ac98878d..8cfe49d201dd 100644
> --- a/include/linux/vdpa.h
> +++ b/include/linux/vdpa.h
> @@ -277,6 +277,17 @@ struct vdpa_device *__vdpa_alloc_device(struct device
*parent,
>   					const struct vdpa_config_ops *config,
>   					size_t size, const char *name);
>   
> +/**
> + * vdpa_alloc_device - allocate and initilaize a vDPA device
> + *
> + * @dev_struct: the type of the parent structure
> + * @member: the name of struct vdpa_device within the @dev_struct
> + * @parent: the parent device
> + * @config: the bus operations that is supported by this device
> + * @name: name of the vdpa device
> + *
> + * Return allocated data structure or ERR_PTR upon error
> + */
>   #define vdpa_alloc_device(dev_struct, member, parent, config, name)   \
>   			  container_of(__vdpa_alloc_device( \
>   				       parent, config, \