diff --git a/drivers/md/md.c b/drivers/md/md.c
index 67e2b501d94f..5fb5ae8368ba 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -487,6 +487,17 @@ int mddev_suspend(struct mddev *mddev, bool interruptible)
 	}
 
 	percpu_ref_kill(&mddev->active_io);
+
+	/*
+	 * RAID456 IO can sleep in wait_for_reshape while still holding an
+	 * active_io reference. If reshape is already interrupted or frozen,
+	 * wake those waiters so they can abort and drop the reference instead
+	 * of deadlocking suspend.
+	 */
+	if (mddev->pers && mddev->pers->prepare_suspend &&
+	    reshape_interrupted(mddev))
+		mddev->pers->prepare_suspend(mddev);
+
 	if (interruptible)
 		err = wait_event_interruptible(mddev->sb_wait,
 				percpu_ref_is_zero(&mddev->active_io));