[PATCH] sctp: fix crypto_alloc_hash() error check

The return value of crypto_alloc_hash() should be checked by
IS_ERR().

Cc: David Miller <davem@davemloft.net>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>

---
 net/sctp/socket.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: work-fault-inject/net/sctp/socket.c
===================================================================

--- work-fault-inject.orig/net/sctp/socket.c
+++ work-fault-inject/net/sctp/socket.c

@@ -4885,8 +4885,8 @@ int sctp_inet_listen(struct socket *sock
 	/* Allocate HMAC for generating cookie. */
 	if (sctp_hmac_alg) {
 		tfm = crypto_alloc_hash(sctp_hmac_alg, 0, CRYPTO_ALG_ASYNC);
-		if (!tfm) {
-			err = -ENOSYS;
+		if (IS_ERR(tfm)) {
+			err = PTR_ERR(tfm);
 			goto out;
 		}
 	}