+
+/******************************************************************************
+ * suspend / resume *
+ *****************************************************************************/
+static int monreader_freeze(struct device *dev)
+{
+ struct mon_private *monpriv = dev->driver_data;
+ int rc;
+
+ if (!monpriv)
+ return 0;
+ if (monpriv->path) {
+ rc = iucv_path_sever(monpriv->path, user_data_sever);
+ if (rc)
+ pr_warning("Disconnecting the z/VM *MONITOR system "
+ "service failed with rc=%i\n", rc);
+ iucv_path_free(monpriv->path);
+ }
+ atomic_set(&monpriv->iucv_severed, 0);
+ atomic_set(&monpriv->iucv_connected, 0);
+ atomic_set(&monpriv->read_ready, 0);
+ atomic_set(&monpriv->msglim_count, 0);
+ monpriv->write_index = 0;
+ monpriv->read_index = 0;
+ monpriv->path = NULL;
+ return 0;
+}
+
+static int monreader_thaw(struct device *dev)
+{
+ struct mon_private *monpriv = dev->driver_data;
+ int rc;
+
+ if (!monpriv)
+ return 0;
+ rc = -ENOMEM;
+ monpriv->path = iucv_path_alloc(MON_MSGLIM, IUCV_IPRMDATA, GFP_KERNEL);
+ if (!monpriv->path)
+ goto out;
+ rc = iucv_path_connect(monpriv->path, &monreader_iucv_handler,
+ MON_SERVICE, NULL, user_data_connect, monpriv);
+ if (rc) {
+ pr_err("Connecting to the z/VM *MONITOR system service "
+ "failed with rc=%i\n", rc);
+ goto out_path;
+ }
+ wait_event(mon_conn_wait_queue,
+ atomic_read(&monpriv->iucv_connected) ||
+ atomic_read(&monpriv->iucv_severed));
+ if (atomic_read(&monpriv->iucv_severed))
+ goto out_path;
+ return 0;
+out_path:
+ rc = -EIO;
+ iucv_path_free(monpriv->path);
+ monpriv->path = NULL;
+out:
+ atomic_set(&monpriv->iucv_severed, 1);
+ return rc;
+}
+
+static int monreader_restore(struct device *dev)
+{
+ int rc;
+
+ segment_unload(mon_dcss_name);
+ rc = segment_load(mon_dcss_name, SEGMENT_SHARED,
+ &mon_dcss_start, &mon_dcss_end);
+ if (rc < 0) {
+ segment_warning(rc, mon_dcss_name);
+ panic("fatal monreader resume error: no monitor dcss\n");
+ }
+ return monreader_thaw(dev);
+}
+
+static struct dev_pm_ops monreader_pm_ops = {
+ .freeze = monreader_freeze,
+ .thaw = monreader_thaw,
+ .restore = monreader_restore,
+};
+
+static struct device_driver monreader_driver = {
+ .name = "monreader",
+ .bus = &iucv_bus,
+ .pm = &monreader_pm_ops,
+};
+
+