[PATCH v4 20/25] virtio_net: enable VQs early on restore

Michael S. Tsirkin
2014-10-13T07:51:24Z

virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after restore returns, virtio net violated this
rule by using receive VQs within restore.

To fix, call virtio_device_ready before using VQs.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
drivers/net/virtio_net.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 3551417..6b6e136 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1912,6 +1912,8 @@ static int virtnet_restore(struct virtio_device *vdev)
if (err)
return err;

+ virtio_device_ready(vdev);
+
if (netif_running(vi->dev)) {
for (i = 0; i < vi->curr_queue_pairs; i++)
if (!try_fill_recv(&vi->rq[i], GFP_KERNEL))
--
MST