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virtio-ccw: validate the number of queues against bus limitation 

Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2015-05-29 14:15:28 +08:00 committed by Michael S. Tsirkin
parent 8dfbaa6ac4
commit 10ceaa1e8f
1 changed files with 9 additions and 0 deletions
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9
hw/s390x/virtio-ccw.c
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@ -1381,7 +1381,16 @@ static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
static void virtio_ccw_device_plugged(DeviceState *d, Error **errp) static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
{ {
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
SubchDev *sch = dev->sch; SubchDev *sch = dev->sch;
int n = virtio_get_num_queues(vdev);
if (virtio_get_num_queues(vdev) > VIRTIO_CCW_QUEUE_MAX) {
error_setg(errp, "The nubmer of virtqueues %d "
"exceeds ccw limit %d", n,
VIRTIO_CCW_QUEUE_MAX);
return;
}
sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus); sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);