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virtio-net: properly check the vhost status during status set

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Commit 32993698 (vhost: disable on tap link down) tries to disable the vhost
also when the peer's link is down. But the check was not done properly, the
vhost were only started when:

1) peer's link is not down
2) virtio-net has already been started.

Since == have a higher precedence than &&, place a brace to make sure both the
conditions were met then does the check. This fixes the crash when doing a savem
after set the link off which let qemu crash and complains:

virtio_net_save: Assertion `!n->vhost_started' failed.

Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-id: 1366972060-21606-1-git-send-email-jasowang@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jason Wang 2013-04-26 18:27:40 +08:00 committed by Anthony Liguori
parent fd8192a5a8
commit d7108d9010
1 changed files with 2 additions and 2 deletions
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4
hw/net/virtio-net.c
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@ -114,8 +114,8 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
return;
}
if (!!n->vhost_started == virtio_net_started(n, status) &&
!nc->peer->link_down) {
if (!!n->vhost_started ==
(virtio_net_started(n, status) && !nc->peer->link_down)) {
return;
}
if (!n->vhost_started) {