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virtio-scsi: dataplane: print why starting failed 

Setting up guest or host notifiers may fail, but the user will have
no idea why: Let's print the error returned by the callback.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Cornelia Huck 2014-10-15 15:15:24 +02:00 committed by Paolo Bonzini
parent 3e2b2a9c49
commit 6d2c83165b
1 changed files with 7 additions and 4 deletions
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11
hw/scsi/virtio-scsi-dataplane.c
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@ -46,10 +46,13 @@ static VirtIOSCSIVring *virtio_scsi_vring_init(VirtIOSCSI *s,
BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s)));
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
VirtIOSCSIVring *r = g_slice_new(VirtIOSCSIVring);
int rc;
/* Set up virtqueue notify */
if (k->set_host_notifier(qbus->parent, n, true) != 0) {
fprintf(stderr, "virtio-scsi: Failed to set host notifier\n");
rc = k->set_host_notifier(qbus->parent, n, true);
if (rc != 0) {
fprintf(stderr, "virtio-scsi: Failed to set host notifier (%d)\n",
rc);
exit(1);
}
r->host_notifier = *virtio_queue_get_host_notifier(vq);
@ -160,8 +163,8 @@ void virtio_scsi_dataplane_start(VirtIOSCSI *s)
/* Set up guest notifier (irq) */
rc = k->set_guest_notifiers(qbus->parent, vs->conf.num_queues + 2, true);
if (rc != 0) {
fprintf(stderr, "virtio-scsi: Failed to set guest notifiers, "
"ensure -enable-kvm is set\n");
fprintf(stderr, "virtio-scsi: Failed to set guest notifiers (%d), "
"ensure -enable-kvm is set\n", rc);
exit(1);
}