qdev: don't crash on unset drive properties.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index c4fb15c..5c627fa 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -208,7 +208,7 @@
static int print_drive(DeviceState *dev, Property *prop, char *dest, size_t len)
{
DriveInfo **ptr = qdev_get_prop_ptr(dev, prop);
- return snprintf(dest, len, "%s", (*ptr)->id);
+ return snprintf(dest, len, "%s", (*ptr) ? (*ptr)->id : "<null>");
}
PropertyInfo qdev_prop_drive = {
