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| author |   Michael S. Tsirkin <mst@redhat.com> | 2014-10-14 10:40:29 +1030 |
|---|---|---|
| committer |   Rusty Russell <rusty@rustcorp.com.au> | 2014-10-15 10:24:53 +1030 |
| commit | 6fbc198cf623944ab60a1db6d306a4d55cdd820d (patch) | |
| tree | f0e9102dc35317a14829f0109ef999bc65379cd8 /include/linux/virtio.h | |
| parent | Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs (diff) | |
| download | linux-dev-6fbc198cf623944ab60a1db6d306a4d55cdd820d.tar.xz linux-dev-6fbc198cf623944ab60a1db6d306a4d55cdd820d.zip | |
virtio_pci: fix virtio spec compliance on restore
On restore, virtio pci does the following:
+ set features
+ init vqs etc - device can be used at this point!
+ set ACKNOWLEDGE,DRIVER and DRIVER_OK status bits
This is in violation of the virtio spec, which
requires the following order:
- ACKNOWLEDGE
- DRIVER
- init vqs
- DRIVER_OK
This behaviour will break with hypervisors that assume spec compliant
behaviour. It seems like a good idea to have this patch applied to
stable branches to reduce the support butden for the hypervisors.
Cc: stable@vger.kernel.org
Cc: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/virtio.h')
0 files changed, 0 insertions, 0 deletions