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virtio_balloon: enable VQs early on restore

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virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after resume returns, virtio balloon
violated this rule by adding bufs, which causes the VQ to be used
directly within restore.

To fix, call virtio_device_ready before using VQ.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Michael S. Tsirkin 2014-10-15 10:22:33 +10:30 committed by Rusty Russell
parent e67423c7b4
commit 486d2e632c
1 changed files with 2 additions and 0 deletions
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2
drivers/virtio/virtio_balloon.c
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@ -538,6 +538,8 @@ static int virtballoon_restore(struct virtio_device *vdev)
if (ret)
return ret;
virtio_device_ready(vdev);
fill_balloon(vb, towards_target(vb));
update_balloon_size(vb);
return 0;