[patch] crypto: drbg - fix an error code in drbg_init_sym_kernel()

[Dan Carpenter]

We accidentally return PTR_ERR(NULL) which is success but we should
return -ENOMEM.

Fixes: 355912852115 ('crypto: drbg - use CTR AES instead of ECB AES')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/crypto/drbg.c b/crypto/drbg.c
index ded8638..6872d15 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -1686,7 +1686,7 @@ static int drbg_init_sym_kernel(struct drbg_state *drbg)
 	if (!req) {
 		pr_info("DRBG: could not allocate request queue\n");
 		drbg_fini_sym_kernel(drbg);
-		return PTR_ERR(req);
+		return -ENOMEM;
 	}
 	drbg->ctr_req = req;
 	skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,