Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pc, virtio bugfixes for 2.3

Several bugfixes, nothing stands out especially.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Wed Mar 25 12:42:10 2015 GMT using RSA key ID D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"

* remotes/mst/tags/for_upstream:
  virtio-net: validate backend queue numbers against bus limitation
  virtio-serial: fix virtio config size
  acpi: Add missing GCC_FMT_ATTR to local function
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/acpi/aml-build.c

@@ -68,7 +68,7 @@ build_append_nameseg(GArray *array, const char *seg)
     g_array_append_vals(array, "____", ACPI_NAMESEG_LEN - len);
 }
 
-static void
+static void GCC_FMT_ATTR(2, 0)
 build_append_namestringv(GArray *array, const char *format, va_list ap)
 {
     /* It would be nicer to use g_string_vprintf but it's only there in 2.22 */

hw/char/virtio-serial-bus.c

@@ -980,8 +980,10 @@ static void virtio_serial_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
+    /* We don't support emergency write, skip it for now. */
+    /* TODO: cleaner fix, depending on host features. */
     virtio_init(vdev, "virtio-serial", VIRTIO_ID_CONSOLE,
-                sizeof(struct virtio_console_config));
+                offsetof(struct virtio_console_config, emerg_wr));
 
     /* Spawn a new virtio-serial bus on which the ports will ride as devices */
     qbus_create_inplace(&vser->bus, sizeof(vser->bus), TYPE_VIRTIO_SERIAL_BUS,

hw/net/virtio-net.c

@@ -1588,6 +1588,13 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
     virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size);
 
     n->max_queues = MAX(n->nic_conf.peers.queues, 1);
+    if (n->max_queues * 2 + 1 > VIRTIO_PCI_QUEUE_MAX) {
+        error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
+                   "must be a postive integer less than %d.",
+                   n->max_queues, (VIRTIO_PCI_QUEUE_MAX - 1) / 2);
+        virtio_cleanup(vdev);
+        return;
+    }
     n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues);
     n->vqs[0].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx);
     n->curr_queues = 1;