When queue number shrinks to 1 from X, the following code stops us
sending the multiple queue ctrl message:
if (nb_queues > 1) {
if (virtio_set_multiple_queues(dev, nb_queues) != 0)
return -EINVAL;
}
This ends up with still X queues being enabled, which is obviously
wrong. Fix it by replacing the check with a multiple queue enabled
or not check.
Fixes: 823ad64795 ("virtio: support multiple queues")
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
663c76798f