diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 1f2e424..8446d15 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -533,6 +533,17 @@
 	return ret;
 }
 
+static void reprobe_after_idle(struct work_struct *unused)
+{
+	/* Make sure initial subchannel scan is done. */
+	wait_event(ccw_device_init_wq,
+		   atomic_read(&ccw_device_init_count) == 0);
+	if (need_reprobe)
+		css_schedule_reprobe();
+}
+
+static DECLARE_WORK(reprobe_idle_work, reprobe_after_idle);
+
 /* Work function used to reprobe all unregistered subchannels. */
 static void reprobe_all(struct work_struct *unused)
 {
@@ -540,10 +551,12 @@
 
 	CIO_MSG_EVENT(4, "reprobe start\n");
 
-	need_reprobe = 0;
 	/* Make sure initial subchannel scan is done. */
-	wait_event(ccw_device_init_wq,
-		   atomic_read(&ccw_device_init_count) == 0);
+	if (atomic_read(&ccw_device_init_count) != 0) {
+		queue_work(ccw_device_work, &reprobe_idle_work);
+		return;
+	}
+	need_reprobe = 0;
 	ret = for_each_subchannel_staged(NULL, reprobe_subchannel, NULL);
 
 	CIO_MSG_EVENT(4, "reprobe done (rc=%d, need_reprobe=%d)\n", ret,