[PATCH v4 19/25] virtio_console: enable VQs early on restore

From: Michael S. Tsirkin
Date: Mon Oct 13 2014 - 03:51:05 EST

virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after resume returns, virtio console violated this
rule by adding inbufs, which causes the VQ to be used directly within

To fix, call virtio_device_ready before using VQs.

Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
drivers/char/virtio_console.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 6ebe8f6..2ae843f 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -2184,6 +2184,8 @@ static int virtcons_restore(struct virtio_device *vdev)
if (ret)
return ret;

+ virtio_device_ready(portdev->vdev);
if (use_multiport(portdev))
fill_queue(portdev->c_ivq, &portdev->c_ivq_lock);


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