[PATCH 0/6] virtio: graceful failure with get == NULL

Rusty Russell
2015-01-20T06:29:15Z

"Michael S. Tsirkin" <mst at redhat.com>
writes:
> On Tue, Jan 13, 2015 at 04:43:07PM +0200, Michael S. Tsirkin wrote:
>> virtio 1.0 says device configuration is optional, but most drivers
treat it as
>> mandatory.  Even if presented by device, guest bios might disable the
BAR
>> holding that configuration, so we can't assume it's there, but
we also don't
>> want to fail if not in case drivers can cope with it's absence -
such as caif
>> or rng.
>>
>> Add code to drivers to check presence of get callback and fail
gracefully.
>
> Rusty, in case it's not clear: I'd like to hear
> your opinion on these patches, since virtio pci modern
> driver I'm now preparing for submission, depends on this.

Just to note for anyone following, that these are now in my virtio-next
tree.

Cheers,
Rusty.