diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index b9651f797676c47b036c6f7c173ee9130383bcc4..54778aadf618da4a5612404bd4f45851b47aa2df 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -240,13 +240,13 @@ void gntdev_put_map(struct gntdev_priv *priv, struct gntdev_grant_map *map)
 	if (!refcount_dec_and_test(&map->users))
 		return;
 
+	if (map->pages && !use_ptemod)
+		unmap_grant_pages(map, 0, map->count);
+
 	if (map->notify.flags & UNMAP_NOTIFY_SEND_EVENT) {
 		notify_remote_via_evtchn(map->notify.event);
 		evtchn_put(map->notify.event);
 	}
-
-	if (map->pages && !use_ptemod)
-		unmap_grant_pages(map, 0, map->count);
 	gntdev_free_map(map);
 }