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virtio-net: avoid call tap_enable when there's only one queue

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We call tap_enable() even if for multiqueue is not enabled. This is
wrong since it should be used for multiqueue codes to enable a
disabled queue. Fixing this by only calling this when multiqueue is
used.

Fixes: 16dbaf905b ("tap: support enabling or disabling a queue")
Reported-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Tested-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Jason Wang 2017-03-29 10:41:23 +08:00
parent ddc2c3a57e
commit 1074b879d1
1 changed files with 4 additions and 0 deletions
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4
hw/net/virtio-net.c
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@ -510,6 +510,10 @@ static int peer_attach(VirtIONet *n, int index)
return 0; return 0;
} }
if (n->max_queues == 1) {
return 0;
}
return tap_enable(nc->peer); return tap_enable(nc->peer);
} }