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

On Wed, Jul 14 2021, Jason Gunthorpe jgg@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@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@redhat.com