[PATCH v2] vfio: fix deadlock between group lock and kvm lock

[Tian, Kevin]

> From: Alex Williamson <alex.williamson at redhat.com>
> Sent: Thursday, February 2, 2023 7:28 AM
> >
> > +#ifdef CONFIG_HAVE_KVM
> > +static bool vfio_kvm_get_kvm_safe(struct vfio_device *device, struct kvm
> *kvm)
> 
> I'm tempted to name these vfio_device_get_kvm_safe() and only pass the
> vfio_device, where of course we can get the kvm pointer from the group
> internally.
> 

I have a different thought. In the end the cdev series also need the similar
safe get/put logic then it's better to keep it in vfio_main.c called by
the group/cdev path individually.