[PKT_SCHED]: cls_api.c: fix module reference leak on module load

Signed-off-by: Patrick McHardy <kaber@trash.net>

net/sched/cls_api.c

@@ -239,9 +239,11 @@ static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 				 * replay the request.  We indicate this using
 				 * -EAGAIN.
 				 */
-				if (tp_ops != NULL)
+				if (tp_ops != NULL) {
+					module_put(tp_ops->owner);
 					err = -EAGAIN;
 				}
+			}
 #endif
 			kfree(tp);
 			goto errout;