[PATCH v4 23/25] virtio_balloon: enable VQs early on restore
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: 2014-10-13 07:48:28
Also in:
kvm, linux-s390, linux-scsi, lkml
Subsystem:
the rest, virtio balloon, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", David Hildenbrand, Jason Wang
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> --- drivers/virtio/virtio_balloon.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 25ebe8e..9629fad 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c@@ -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;
--
MST