diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 757687fb90a7..60963449d3f5 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1785,6 +1785,8 @@ static int raid10_handle_discard(struct mddev *mddev, struct bio *bio)
 		r10_bio->devs[disk].bio = NULL;
 		r10_bio->devs[disk].repl_bio = NULL;
 
+		if (rdev == rrdev)
+			rrdev = NULL;
 		if (rdev && (test_bit(Faulty, &rdev->flags)))
 			rdev = NULL;
 		if (rrdev && (test_bit(Faulty, &rrdev->flags)))