diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index ff6660f1fa68..a8e0836dffd4 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -633,11 +633,13 @@ static int add_ballooned_pages(int nr_pages)
 	if (xen_hotplug_unpopulated) {
 		st = reserve_additional_memory();
 		if (st != BP_ECANCELED) {
+			int rc;
+
 			mutex_unlock(&balloon_mutex);
-			wait_event(balloon_wq,
+			rc = wait_event_interruptible(balloon_wq,
 				   !list_empty(&ballooned_pages));
 			mutex_lock(&balloon_mutex);
-			return 0;
+			return rc ? -ENOMEM : 0;
 		}
 	}