repository: /home/dor/src/merge/kvm
branch: trunk
commit acdb6d2aa7332179eead306ead17494ae23edbd6
Author: Dor Laor <[EMAIL PROTECTED]>
Date: Tue Mar 4 08:16:06 2008 -0500
Check device status in tx timer.
The device can be down when the timer pops.
If it is down it will cause segfault.
It might happen on migration but also on regular operation
when the device sends packets and quickly goes down before
the host timer pops.
Signed-off-by: Dor Laor <[EMAIL PROTECTED]>
diff --git a/qemu/hw/virtio-net.c b/qemu/hw/virtio-net.c
index 612cf6b..a05eafb 100644
--- a/qemu/hw/virtio-net.c
+++ b/qemu/hw/virtio-net.c
@@ -280,6 +280,10 @@ static void virtio_net_tx_timer(void *opaque)
{
VirtIONet *n = opaque;
+ /* Just in case the driver is not ready on more */
+ if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
+ return;
+
n->tx_vq->vring.used->flags &= ~VRING_USED_F_NO_NOTIFY;
n->tx_timer_active = 0;
virtio_net_flush_tx(n, n->tx_vq);
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