[PATCH v4 19/25] virtio_console: enable VQs early on restore
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: 2014-10-13 07:51:02
Also in:
kvm, linux-s390, linux-scsi, lkml, virtualization
Subsystem:
char and misc drivers, the rest, virtio console driver · Maintainers:
Arnd Bergmann, Greg Kroah-Hartman, Linus Torvalds, Amit Shah
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 restore. To fix, call virtio_device_ready before using VQs. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- 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);
--
MST