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Don't notify virtio devices before S_DRIVER_OK (Mark McLoughlin)

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Current Linux guests oops if the host notifies of a
config change before a driver has been bound to the
device.

It's pretty pointless for us to do notify of config
changes before status is S_DRIVER_OK anyway, so let's
just not do it.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6471 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-01-29 17:02:13 +00:00
parent 22bf14582a
commit 7625162ca4
1 changed files with 3 additions and 0 deletions
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3
hw/virtio.c
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@ -738,6 +738,9 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
void virtio_notify_config(VirtIODevice *vdev)
{
if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))
return;
vdev->isr |= 0x03;
virtio_update_irq(vdev);
}