[PATCH 11/13] vfio/ap,ccw: Fix open/close when multiple device FDs are open

[Cornelia Huck]

On Wed, Jul 14 2021, Jason Gunthorpe <jgg at nvidia.com> wrote:

> The user can open multiple device FDs if it likes, however these open()
> functions call vfio_register_notifier() on some device global
> state. Calling vfio_register_notifier() twice in will trigger a WARN_ON
> from notifier_chain_register() and the first close will wrongly delete the
> notifier and more.
>
> Since these really want the new open/close_device() semantics just change
> the functions over.
>
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
> ---
>  drivers/s390/cio/vfio_ccw_ops.c   | 8 ++++----
>  drivers/s390/crypto/vfio_ap_ops.c | 8 ++++----
>  2 files changed, 8 insertions(+), 8 deletions(-)

Reviewed-by: Cornelia Huck <cohuck at redhat.com>