[SCSI] iscsi: always release crypto

Unconditionally free crypto state, as it is always allocated during
TCP connection creation.  Without this, crypto structures leak and
crc32c module refcounts grow as connections are created and
destroyed.

Signed-off-by: Pete Wyckoff <pw@osc.edu>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/iscsi_tcp.c

@@ -1816,21 +1816,14 @@ iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn)
 {
 	struct iscsi_conn *conn = cls_conn->dd_data;
 	struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
-	int digest = 0;
-
-	if (conn->hdrdgst_en || conn->datadgst_en)
-		digest = 1;
 
 	iscsi_tcp_release_conn(conn);
 	iscsi_conn_teardown(cls_conn);
 
-	/* now free tcp_conn */
-	if (digest) {
-		if (tcp_conn->tx_hash.tfm)
-			crypto_free_hash(tcp_conn->tx_hash.tfm);
-		if (tcp_conn->rx_hash.tfm)
-			crypto_free_hash(tcp_conn->rx_hash.tfm);
-	}
+	if (tcp_conn->tx_hash.tfm)
+		crypto_free_hash(tcp_conn->tx_hash.tfm);
+	if (tcp_conn->rx_hash.tfm)
+		crypto_free_hash(tcp_conn->rx_hash.tfm);
 
 	kfree(tcp_conn);
 }