Re: [PATCH] vfio/mdev: remove unnecessary NULL check in mbochs_create()

[Alex Williamson <alex.williamson@redhat.com>]

On Wed, 21 Apr 2021 16:29:36 +0300
Dan Carpenter <dan.carpenter@oracle.com> wrote:

> This NULL check is no longer required because "type" now points to
> an element in a non-NULL array.

I think the mdpy change is correct too, but it's hard to verify from
this commit log that it was actually intended.  Can we note that change
as well?  Thanks,

Alex

> 
> Fixes: 3d3a360e570616 ("vfio/mbochs: Use mdev_get_type_group_id()")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
>  samples/vfio-mdev/mbochs.c | 2 --
>  samples/vfio-mdev/mdpy.c | 3 +--
>  2 files changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
> index 861c76914e76..881ef9a7296f 100644
> --- a/samples/vfio-mdev/mbochs.c
> +++ b/samples/vfio-mdev/mbochs.c
> @@ -513,8 +513,6 @@ static int mbochs_create(struct mdev_device *mdev)
>  	struct device *dev = mdev_dev(mdev);
>  	struct mdev_state *mdev_state;
>  
> -	if (!type)
> -		type = &mbochs_types[0];
>  	if (type->mbytes + mbochs_used_mbytes > max_mbytes)
>  		return -ENOMEM;
>  
> diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c
> index f0c0e7209719..e889c1cf8fd1 100644
> --- a/samples/vfio-mdev/mdpy.c
> +++ b/samples/vfio-mdev/mdpy.c
> @@ -667,8 +667,7 @@ static ssize_t description_show(struct mdev_type *mtype,
>  		&mdpy_types[mtype_get_type_group_id(mtype)];
>  
>  	return sprintf(buf, "virtual display, %dx%d framebuffer\n",
> -		       type ? type->width  : 0,
> -		       type ? type->height : 0);
> +		       type->width, type->height);
>  }
>  static MDEV_TYPE_ATTR_RO(description);
>