error: New QERR_DEVICE_IN_USE

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/qerror.h b/qerror.h
index 5625d54..bae08c0 100644
--- a/qerror.h
+++ b/qerror.h
@@ -67,6 +67,9 @@
 #define QERR_DEVICE_INIT_FAILED \
     "{ 'class': 'DeviceInitFailed', 'data': { 'device': %s } }"
 
+#define QERR_DEVICE_IN_USE \
+    "{ 'class': 'DeviceInUse', 'data': { 'device': %s } }"
+
 #define QERR_DEVICE_LOCKED \
     "{ 'class': 'DeviceLocked', 'data': { 'device': %s } }"