[PATCH v3 11/11] virtio: balloon: Add freeze, restore handlers to support S4
From: Amit Shah <hidden>
Date: 2011-11-17 11:58:36
Also in:
lkml
Subsystem:
the rest, virtio balloon, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", David Hildenbrand, Jason Wang, Eugenio Pérez
Delete the vqs on the freeze callback to prepare for hibernation. Re-create the vqs in the restore callback to resume normal function. Signed-off-by: Amit Shah <redacted> --- drivers/virtio/virtio_balloon.c | 20 ++++++++++++++++++++ 1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 1ff3cf4..90149d1 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c@@ -363,6 +363,22 @@ static void __devexit virtballoon_remove(struct virtio_device *vdev) kfree(vb); } +#ifdef CONFIG_PM +static int virtballoon_freeze(struct virtio_device *vdev) +{ + /* Now we reset the device so we can clean up the queues. */ + vdev->config->reset(vdev); + + vdev->config->del_vqs(vdev); + return 0; +} + +static int virtballoon_restore(struct virtio_device *vdev) +{ + return init_vqs(vdev->priv); +} +#endif + static unsigned int features[] = { VIRTIO_BALLOON_F_MUST_TELL_HOST, VIRTIO_BALLOON_F_STATS_VQ,
@@ -377,6 +393,10 @@ static struct virtio_driver virtio_balloon_driver = { .probe = virtballoon_probe, .remove = __devexit_p(virtballoon_remove), .config_changed = virtballoon_changed, +#ifdef CONFIG_PM + .freeze = virtballoon_freeze, + .restore = virtballoon_restore, +#endif }; static int __init init(void)
--
1.7.7.1