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Subject[PATCH 09/11] virtio: net: Add freeze, restore handlers to support S4
Date
Remove all the vqs on hibernation and re-create them after restoring
from a hibernated image. This keeps networking working across
hibernation.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
---
drivers/net/virtio_net.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index dcd4b01..d4391c0 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1131,6 +1131,30 @@ static void __devexit virtnet_remove(struct virtio_device *vdev)
free_netdev(vi->dev);
}

+#ifdef CONFIG_PM
+static int virtnet_freeze(struct virtio_device *vdev)
+{
+ struct virtnet_info *vi = vdev->priv;
+
+ remove_vq_common(vi);
+
+ return 0;
+}
+
+static int virtnet_restore(struct virtio_device *vdev)
+{
+ struct virtnet_info *vi = vdev->priv;
+ int err;
+
+ err = init_vqs(vi);
+ if (err)
+ return err;
+
+ try_fill_recv(vi, GFP_KERNEL);
+ return 0;
+}
+#endif
+
static struct virtio_device_id id_table[] = {
{ VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID },
{ 0 },
@@ -1155,6 +1179,10 @@ static struct virtio_driver virtio_net_driver = {
.probe = virtnet_probe,
.remove = __devexit_p(virtnet_remove),
.config_changed = virtnet_config_changed,
+#ifdef CONFIG_PM
+ .freeze = virtnet_freeze,
+ .restore = virtnet_restore,
+#endif
};

static int __init init(void)
--
1.7.6.2


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