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[v4,23/25] virtio_balloon: enable VQs early on restore

Message ID 1413114332-626-24-git-send-email-mst-v4@redhat.com
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Michael S. Tsirkin Oct. 13, 2014, 7:51 a.m. UTC 
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(+)
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Patch

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;