[Intel-gfx] [PATCH v2 13/14] vfio/gvt: Fix open/close when multiple device FDs are open

[Christoph Hellwig]

On Tue, Jul 20, 2021 at 02:42:59PM -0300, Jason Gunthorpe wrote:
> The user can open multiple device FDs if it likes, however the open
> function calls vfio_register_notifier() on device global state. Calling
> vfio_register_notifier() twice 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 function over.
> 
> Reviewed-by: Zhenyu Wang <zhenyuw at linux.intel.com>
> Reviewed-by: Cornelia Huck <cohuck at redhat.com>
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch at lst.de>