Re: [Qemu-devel] [PATCH] virtio: destroy region cache during reset

[Cornelia Huck]

On Thu, 9 Mar 2017 12:12:00 +0100
Paolo Bonzini <address@hidden> wrote:

> On 09/03/2017 12:07, Cornelia Huck wrote:
> >>> - Driver #2 uses the device without doing a reset or proper setup
> >> Without this patch, even if driver #2 do a reset, it can still use the 
> >> old map if it don't set queue pfn.
> > 
> > Yes, the cleanup-on-reset is definetly needed.
> 
> It is good to have for defensiveness, but it would still cause a
> segfault so we should also add the checks on vq->vring.desc throughout.

Agreed.