diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index be8ac24f50b6..7b8a71ca66dd 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1558,7 +1558,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 		for (j = 0; j < i; j++)
 			if (r1_bio->bios[j])
 				rdev_dec_pending(conf->mirrors[j].rdev, mddev);
-		free_r1bio(r1_bio);
+		mempool_free(r1_bio, &conf->r1bio_pool);
 		allow_barrier(conf, bio->bi_iter.bi_sector);
 
 		if (bio->bi_opf & REQ_NOWAIT) {