Write the error message and the hotplug-status=busy in the same transaction, to

ensure that the message is picked up.

Signed-off-by: Ewan Mellor <ewan@xensource.com>

tools/examples/block-common.sh

@@ -34,8 +34,8 @@ XENBUS_PATH="${XENBUS_PATH:?}"
 
 ebusy()
 {
-  xenstore_write "$XENBUS_PATH/hotplug-status" busy
-  xenstore_write "$XENBUS_PATH/hotplug-error" "$*"
+  xenstore_write "$XENBUS_PATH/hotplug-error" "$*" \
+                 "$XENBUS_PATH/hotplug-status" busy
   log err "$@"
   exit 1
 }