diff --git a/drivers/md/bcache/io.c b/drivers/md/bcache/io.c
index 48efd4dea645bde1b12cf69927e9f628fd1ae077..d285cd49104c895e75220040007be1d5bf96ad50 100644
--- a/drivers/md/bcache/io.c
+++ b/drivers/md/bcache/io.c
@@ -97,6 +97,8 @@ struct bio *bch_bio_split(struct bio *bio, int sectors,
 
 	if (bio->bi_rw & REQ_DISCARD) {
 		ret = bio_alloc_bioset(gfp, 1, bs);
+		if (!ret)
+			return NULL;
 		idx = 0;
 		goto out;
 	}